PA333/10-97 - Datasheet Archive

 

2950 Zanker Road San Jose, CA 95134 (408) 434-0600 PA333/10-97 Errata for 69000 HiQVideoTM with Embedded Memory ES0.1 Silicon The

 

Chips and Technologies, Inc. 2950 Zanker Road San Jose, CA 95134 (408) 434-0600 PA333/10-97 PA333/10-97 Errata for 69000 HiQVideoTM with Embedded Memory ES0.1 Silicon The anomalies listed below apply to the 69000 ES0.1 silicon revision. This is a preliminary list, which only contains the results of tests performed through September 18, 1997. This list is subject to revision as a result of continued device validation testing. Due to the number and types of anomalies found in this revision of the silicon, it was not possible to fully validate the silicon. This implies that there may be other anomalies in the controller not listed here. Anomaly #1: Blank Screen when Disabling Horizontal Stretching Problem: Horizontal stretching can be disabled by writing bits in FR40 or by changing modes from graphics to text (or vice versa) where one of the modes has Horizontal Stretching disabled. When either of these two operations takes place, randomly the screen will go blank in the 69000. Workaround: Horizontal stretching should only be disabled during the Vertical Retrace Period, which can be checked by polling bit 3 of ST01. This anomaly will be corrected in revision ES1.0 of the silicon. Anomaly #2: Pulsating image on large STN panels (1024x768) when TMED is enabled Problem: The current TMED algorithm shows pulsating images on large STN panels. This lmits the use i to resolutions of 800x600 or lower. Workaround: None. This anomaly will be corrected in revision ES1.0 of the silicon. Anomaly #3: Standard VGA mode problem with Blink bit 3 in AR10 Problem: In standard VGA Graphics modes like mode 12, if we set the Blink bit 3 in AR10, then the color of the first pixel of every byte becomes different for green, cyan, yellow and white regardless of the plane three bit. Green becomes black, cyan becomes blue, yellow becomes red, and white becomes pink. Workaround: None. This anomaly will be corrected in revision ES1.0 of the silicon. Anomaly #4: Display Enable status readback too early Problem: ST01 bit 0 indicates active or inactive display 52 dot clocks too early. This bit is typically used by games that bypass the VGA BIOS to program the DAC, etc. Workaround: None. This anomaly will be corrected in revision ES1.0 of the silicon. Errata for 69000 HiQVideoTM ES0.1 Silicon - Chips and Technologies, Inc. - Rev. 1.0 - PA333/10-97 PA333/10-97 - Page 1 of 3 Anomaly #5: Intermittent Video Data Corruption with high MCLK Problem: There is an issue with some intermittent corruption on incoming video port data when the 69000 is operated at MCLKs higher then 65 MHz. Pixels from the preceding capture line may appear in the line currently being captured. Workaround: When capturing video data the MCLK of the 69000 must be below 65MHz. This anomaly will be corrected in revision ES1.0 of the silicon. Anomaly #6: Intermittent Memory Power Down mode failure Problem: When activating either the sleep mode of RAM power down mode, there is a timing error that may cause the RAM to lose data when in either of these modes. Workaround: There is no workaround. This anomaly will be corrected in revision ES1.0 of the silicon. Anomaly #7: Read-Modify-Write Operation Random Failure Problem: When the 69000 ES0.1 is executing a read-modify-write operation there may be random failure which show up on the display as screen data corruption. Workaround: There is no workaround. This anomaly will be corrected in revision ES1.0 of the silicon. Anomaly #8: Self-Refresh activation by RAS/CAS1 instead of RAS/CAS0 Problem: The self-refresh operation of the memory sub-system in the 69000 is activated by CKE and RAS/CAS0 going to a low state. Intermittently RAS/CAS1 will transition low instead of RAS/CAS0, which will prevent the memory from performing self-refresh. Data corruption will occur when this happens due to the fact that the memory is not being refreshed. The amount of corruption depends upon the length of time that the controller is in this mode. Workaround: There is no workaround. This anomaly will be corrected in revision ES1.0 of the silicon. Anomaly #9: Cursor Position off by 2 characters in VGA Text Mode Problem: In 69000 ES0.1 text mode, the cursor will appear two character locations to the right of the actual position. Screen operations such as entering and deleting test from the keyboard will take place at the proper position, however the, typically underline, cursor will be displaced two characters to the left due to the timing of the data output from the SDRAM. Workaround: There is no workaround. This anomaly will be corrected in revision ES1.0 of the silicon. Errata for 69000HiQVideo ES0.1 Silicon - Chips and Technologies, Inc - Rev. 1.0 - PA333/10-97 PA333/10-97 - Page of 3 TM . 2 Anomaly #10: Interlaced Video Playback Even Lines Out of Sequence Problem: When displaying interlaced video data the even lines of the display are shifted down by two lines causing a corrupted or incorrect display. Workaround: To workaround this anomaly, the horizontal front porch should be programmed to