Rainbow Electronics W90P710CDG User Manual
Page 511
W90P710CD/W90P710CDG
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6.22.1 PS2 Host Controller Interface Register Map
REGISTER
ADDRESS
R/W
DESCRIPTION
RESET VALUE
PS2CMD
0xFFF8_9000
R/W PS2 Host Controller Command Register 0x0000_0000
PS2STS
0xFFF8_9004
R/W PS2 Host Controller Status Register
0x0000_0000
PS2SCANCODE 0xFFF8_9008 RO PS2 Host Controller RX Scan Code
Register
0x0000_0000
PS2ASCII
0xFFF8_900C RO PS2 Host Controller RX ASCII Code
Register
0x0000_0000
6.22.2 Register Description
PS2 Host Controller Command Register (PS2_CMD)
REGISTER
ADDRESS
R/W
DESCRIPTION
RESET VALUE
PS2CMD 0xFFF8_9000
R/W
Command
register
0x0000_0000
31
30
29
28
27
26
25
24
RESERVED
23
22
21
20
19
18
17
16
RESERVED
15
14
13
12
11
10
9
8
RESERVED
TRAP_SHIFT
EnCMD
7
6
5
4
3
2
1
0
PS2CMD
BITS
DESCRIPTIONS
[31:10] RESERVED
-
[9]
TRAP_SHIFT
Trap Shift Key Output to Scan Code Register
If the shift key scan code (0x12 0r 0x59) is received by host,
software can indicate host whether to update to scan code
register or not. No ASCII or SCAN codes will be reported for the
shift keys if this bit is set. In this condition, host will only report the
shift keys at the RX_shift_key bit of Status register and no
interrupt will occur for the shift keys. This is useful for those who
wish to use the ASCII data stream and don’t want to “manually”
filter out the shift key codes. This bit is clear by default.