_80C32 Module 80C32 Module General Description Maxim 80C32 m

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_80C32 Module 80C32 Module General Description Maxim 80C32 m

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80C32MODULE
_80C32 Module
80C32 Module General Description
Maxim 80C32 microcontroller (µC) module intended with this other Maxim evaluation kits kits). contains 80C32 RS-232 interface, 8kbytes EPROM, 32kbytes static RAM, address decoding logic. 40-pin connector mates with connector found Maxim kits designed interface with 80C32 module. module connected IBM-compatible personal computer over serial communications port. Software provided with each runs computer controls unit consisting 80C32 module kit. program uses routine stored 27C64 EPROM download special 80C32 code each kit. downloaded code controls and, together with program running personal computer, displays output data. board operates from single supply. Both pre-regulated regulated levels available through 40-pin connector.
_80C32 Module Component List
DESIGNATION C10, C11, C13, IC10 None None None None DESCRIPTION 15pF ceramic capacitors 0.1µF, ceramic capacitors 22µF, radial electrolytic capacitors 1N4001 diode 40-pin right-angle male connector right-angle socket resistor 10-pin, 9-resistor Power switch Reset switch 80C32 MAX233CPP 27C64 74HCT573 74HCT139 74HCT08 74HCT245 62256 78M05 MAX707CPA 11.059MHz crystal 2-pin power connector 28-pin 600-mil socket (the EPROM) Rubber feet 3.00" 5.50" board
80C32 Module Power Supply
Maxim 80C32 module requires input normal operation. on-board 78M05 power regulator supplies required logic module, requirements attached 40-pin connector. pre-regulated voltage also available data connector. source must capable supplying 100mA module meeting load requirements kit.
Microprocessor Supervisor
MAX707 module monitors logic supply, generates power-on reset, produces reset pulse whenever reset button pressed. watchdog function included because they frequently interfere while debugging programs, debugging prime function this board.
80C32 Microcontroller
80C32 member popular Intel 8051 family µCs. low-power CMOS version that requires external program storage, bytes internal RAM, four 8-bit ports. Three ports required system serial communications memory control. fourth port (P1) available through data connector. 80C32 communicates with over serial RS232 link. MAX233 acts level shifter between ±15V RS-232 signals levels 80C32.
MAX186 Evaluation System/Evaluation
MAX233 also generates output voltages necessary drive RS-232 lines. Port (pins 32-39) 80C32 multiplexes lower eight bits memory address eight bits read/write data. lower eight bits address data latched during each cycle 74HCT573 octal latch. latch controlled address latch enable (ALE) signal 80C32. Port (pins 21-28) 80C32 supplies upper eight bits address information. port pins (10-17) provide several unrelated functions. Pins used receive data (RxD) transmit data (TxD) pins RS-232 link. Pins write (WR) read (RD) control signals data cycles. Four other pins configured interrupt timer controls, used this board.
Address Ranges
Logic module board generates various enable signals different address ranges. enable signals directly respective chips. Several additional signals (CS0-CS3) available data connector used Maxim kits. Table outlines address range each elements found 80C32 module. Table Address Ranges Hexadecimal
ADDRESS RANGE (HEX) 0000 4000 C000 D000 E000 F000 3FFF BFFF CFFF DFFF EFFF FFFF ENABLE SIGNAL
Evaluates: MAX186
Data Connector
40-pin connector mounted edge printed circuit board provides connection between module other Maxim kits. Both power digital signals transferred connector. join module board with kit, carefully align insert pins connector with mating 40-pin female connector kit. functions listed Table Table Connector Functions
15-18 19-26 27-34 35-40 FUNCTION Ground Pre-regulator input Regulated ADDR0-ADDR3 DB0-DB7 P1.0-P1.7 Reserved DESCRIPTION
Memory
board 27C64 EPROM containing code initializing 80C32 downloading additional program code 62256 RAM. After reset, EPROM resident code initializes 80C32, determines address range RAM, sets RS-232 baud rate 1200, waits communications from Receiving character will prompt program send initial banner that includes program name, revision level, boundaries on-board RAM. 62256 CMOS (32kbyte) static used hold program code various Maxim kits that 80C32 module controller. Programs transferred from disk using software running personal computer, such MAXLOAD other programs provided with Maxim kits. Programs written execute from this start 4000 (HEX) typically less than 4kbytes long. remaining available data storage.
Read strobe Write strobe Address C000-CFFF Address D000-DFFF Address E000-EFFF Address F000-FFFF Lowest bits address 8-bit data bits port
MAX186 Evaluation System/Evaluation Evaluates: MAX186
Software Architecture
Software kits using Maxim 80C32 module divided into three elements: interface program running IBM-compatible module program located EPROM, program supplied disk that transferred located module. Immediately following transmission logon banner, program runs checker routine on-board 256kbit static RAM. filled with several patterns then read verify that each pattern been retained. pass fail indication displayed personal computer after each pass. software requires proper operation RAM. attempt board checks fail. other programs kits provided floppy disk shipped with each kit. program acts user interface transmits commands 80C32 module. other 80C32 application program that executes from located module. procedure loading programs varies with each kit, follow instructions provided.
EPROM Resident Program
EPROM resident program initializes 80C32, establishes communications over RS-232 link, verifies static RAM, downloads other programs. operation starts power-up whenever reset button pressed. After reset, program waits indefinitely receive character over RS-232 port. When first character received, logon banner identifying module firmware revision transmitted.
MAX186 Evaluation System/Evaluation Evaluates: MAX186
Figure 80C32 Module Component Placement Guide (x2)
MAX186 Evaluation System/Evaluation Evaluates: MAX186
MNEMONICS REFER HOST (DTE)
P1.0-P1.7 27-34
MAX233A T1IN T2IN R2IN R2OUT C1C2+ C216 VC214 GNDV+
P1.0 P1.1 P1.2 P1.3 P1.4 P1.5 P1.6 P1.7 -INT0 -INT1
74HCT
MAX707 RESET RESET N.C. RESET
XTAL2 XTAL1 -PSEN 11.059MHz HCT08 27pF HCT08 HCT08
27pF18
27C64 N.C./A13
HCT139
HCT08
Figure 80C32 Module Schematic
MAX186 Evaluation System/Evaluation Evaluates: MAX186
62256 I/O1 I/O2 I/O3 I/O4 I/O5 I/O6 I/O7 I/O8 74HCT /245
ADDR0-4 15-18
DB00-DB07 19-26
LS139
-CS0 -CS3 11-14
RESERVED 35-40 POWER SWITCH POWER CONNECTOR 47µF
POWER
C4-C12 0.1µF
70M05 VOUT
47µF
47µF
Figure 80C32 Module Schematic (continued)
MAX186 Evaluation System/Evaluation Evaluates: MAX186
Figure 80C32 Module Component- Side Layout (x2)
MAX186 Evaluation System/Evaluation Evaluates: MAX186
Figure 80C32 Module Solder-Side Layout (x2)
MAX186 Evaluation System/Evaluation Evaluates: MAX186
Maxim cannot assume responsibility circuitry other than circuitry entirely embodied Maxim product. circuit patent licenses implied. Maxim reserves right change circuitry specifications without notice time.
_Maxim Integrated Products, Gabriel Drive, Sunnyvale, 94086 (408) 737-7600 1996 Maxim Integrated Products Printed registered trademark Maxim Integrated Products.

_80C32 Module 80C32 Module General Description Maxim 80C32 m

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