Compaq DC7600 HP Compaq dx 7200 and dc7600 Personal Computers, Technical Refer - Page 79
SCH5307 I/O Controller Functions, SCH5307 I/O Controller Control Registers
UPC - 882780682009
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System Support 4.6.2 SCH5307 I/O Controller Functions The SCH5307 I/O controller contains various functions such as the keyboard/mouse interfaces, diskette interface, serial interfaces, and parallel interface. While the control of these interfaces uses standard AT-type I/O addressing (as described in chapter 5) the configuration of these functions uses indexed ports unique to the SCH5307. In these systems, hardware strapping selects I/O addresses 02Eh and 02Fh at reset as the Index/Data ports for accessing the logical devices within the SCH5307. Table 4-15 lists the PnP standard control registers for the SCH5307. Index 02h 03h 07h 20h 21h 22h 23h 24h 25h 26h 27h 28-2Fh Table 4-15. SCH5307 I/O Controller Control Registers Function Configuration Control Reserved Logical Device (Interface) Select: 00h = Diskette Drive I/F 01h = Reserved 02h = Reserved 03h = Parallel I/F 04h = Serial I/F (UART 1/Port A) 05h = Serial I/F (UART 2/Port B) 06h = Reserved 07h = Keyboard I/F 08h = Reserved 09h = Reserved 0Ah = Runtime Registers (GPIO Config.) 0Bh = SMBus Configuration Super I/O ID Register (SID) Revision Logical Device Power Control Logical Device Power Management PLL / Oscillator Control Reserved Configuration Address (Low Byte) Configuration Address (High Byte) Reserved Reset Value 00h 00h 56h -- 00h 00h 04h NOTE: For a detailed description of registers refer to appropriate documentation available from SMC Corporation. Technical Reference Guide www.hp.com 4-25