W90P710_05 Datasheet, PDF (501/526 Pages) Winbond – 16/32-bit ARM microcontroller

W90P710
Continued
BITS
DESCRIPTIONS
Enable write PS2 Host Controller Commands
This bit enables the write function of Host controller command to
[8]
EnCMD
device. Set this bit will start the write process of PS2CMD content
and hardware will automatically clear this bit while write process is
finished.
PS2 Host Controller Commands
[7:0]
PS2CMD
This command filed is sent by the Host to the Keyboard. The most
common command would be the setting/resetting of the Status
Indicators (i.e. the Num lock, Caps Lock & Scroll Lock LEDs).
PS2 Host Controller Status Register (PS2_STS)
REGISTER
PS2STS
ADDRESS
R/W
0xFFF8_9004 R/W
DESCRIPTION
Status register
RESET VALUE
0x0000_0000
31
30
23
22
15
14
7
6
RESERVED
29
28
27
26
25
RESERVED
21
20
19
18
17
RESERVED
13
12
11
10
9
RESERVED
5
4
3
2
1
TX_err TX_IRQ
RESERVED
24
16
8
0
RX_IRQ
BITS
[31:6]
[5]
[4]
RESERVED
TX_err
TX_IRQ
DESCRIPTIONS
-
This Transmit Error Status bit indicates software that device
doesn’t response ACK after Host wrote a command to it.
This bit is valid when TX_IRQ is asserted. It will automatically
reset after software starts next command writing process.
This bit is read only.
This Transmit Complete Interrupt bit indicates software that
the process of Host controller writing command to device is
finished. Software needs to write one to this bit to clear this
interrupt.
- 501 -
Publication Release Date: January 17, 2005
Revision A.2