參數(shù)資料
型號(hào): CL-PS7111
廠商: Cirrus Logic, Inc.
英文描述: Low-Power System-on-a-Chip
中文描述: 低功耗系統(tǒng)級(jí)晶片
文件頁數(shù): 51/105頁
文件大小: 1207K
代理商: CL-PS7111
PRELIMINARY DATA BOOK v2.0
September 1997
50
REGISTER DESCRIPTIONS
CL-PS7111
Low-Power System-on-a-Chip
5.9
System Status Flags Register 1 — SYSFLG1
The System Status Flags register 1 is a 32-bit read-only register that indicates various system informa-
tion.
3:0
Keyboard Scan:
This 4-bit field that defines the state of the keyboard column drives.
31
30
29
28
27
26
25
24
VERID
ID
BOOTBIT1
BOOTBIT0
SSIBUSY
CTXFF
CRXFE
23
22
21
20
19
18
17
16
UTXFF1
URXFE1
RTCDIV
15
14
13
12
11
10
9
8
CLDFLG
PFFLG
RSTFLG
NBFLG
UBUSY1
DCD
DSR
CTS
7
6
5
4
3
2
1
0
DID
WUON
WUDR
DCDET
MCDR
Bit
Description
31:30
VERID:
Version ID bits. These two bits determine the version identification for the CL-PS7111. Reads ‘0’ for the first ver-
sion.
29
ID:
Always reads ‘1’ for the CL-PS7111. Always reads ‘0’ for the CL-PS7110.
Bit
Description
(cont.)
Keyboard Scan
Column
0
All driven high
1
All driven low
2–7
All high impedance (tristate)
8
Column 0 only driven high, all others high impedance
9
Column 1 only driven high, all others high impedance
10
Column 2 only driven high, all others high impedance
11
Column 3 only driven high, all others high impedance
12
Column 4 only driven high, all others high impedance
13
Column 5 only driven high, all others high impedance
14
Column 6 only driven high, all others high impedance
15
Column 7 only driven high, all others high impedance
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