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CS4237B Datasheet(PDF) 20 Page - Cirrus Logic |
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CS4237B Datasheet(HTML) 20 Page - Cirrus Logic |
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20 / 114 page  NOTE: To enable the PnP/Crystal Keys after they have been disabled by the SLAM method, bring the RESDRV pin to a logic high or remove power from the device. The following illustrates typical data sent using the SLAM method. 006h, 001h ; CSN=1 015h, 000h ; LOGICAL DEVICE 0 047h, 005h, 034h ; WSSbase = 0x534 048h, 003h, 088h ; SYNbase = 0x388 042h, 002h, 020h ; SBbase = 0x220 022h, 005h ; WSS & SB IRQ = 5 02Ah, 001h ; WSS & SB DMA0 = 1 025h, 003h ; WSS capture DMA1 = 3 033h, 001h ; activate logical device 0 015h, 001h ; LOGICAL DEVICE 1 047h, 002h, 000h ; GAMEbase = 0x200 033h, 001h ; activate logical device 1 015h, 002h ; LOGICAL DEVICE 2 047h, 001h, 020h ; CTRLbase = 0x120 033h, 001h ; activate logical device 2 015h, 003h ; LOGICAL DEVICE 3 047h, 003h, 030h ; MPUbase=0x330 022h, 009h ; MPU IRQ = 9 033h, 001h ; activate logical device 3 079h ; activate Crystal device If all the above data is sent, after the Crystal key, all devices except the CDROM and Modem will respond to the appropriate resources given. Hardware Configuration Data The Hardware Configuration data contains map- ping information that links interrupt and DMA pins with actual interrupt numbers used by PnP and SLAM procedures. This data also controls the XCTL0/XA2 pin functionality. The Hard- ware Configuration data precedes the PnP Resource data. The Hardware Configuration data is either 19 or 23 bytes long and contains the data necessary to configure the part. If an E 2PROM is not used (Hostload), the first four bytes are not needed, which means the configuration data is only 19 bytes long. The configuration data maps the many functions of the logical devices to the physical pins of the chip. Table 2 lists the Hard- ware Configuration bytes. The detailed bit descriptions for each byte follows below. HW Config. Byte 5: ACDbase Address Length Mask, Default = 00000000 D7 D6 D5 D4 D3 D2 D1 D0 res res res res res CM2 CM1 CM0 CM2-CM0 Address bit masks for the Alternate CDROM address decode, ACDbase. See the CDROM Interface section for more details on ACDbase 000 - ACDCS low for 1 byte 001 - ACDCS low for 2 bytes 011 - ACDCS low for 4 bytes 111 - ACDCS low for 8 bytes xxx - all others, RESERVED DS213PP4 CS4237B 20 |
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Similar Description - CS4237B |
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