CL-PS7110-VI-A View Datasheet(PDF) - Cirrus Logic
Part Name
Description
MFG CO.
'CL-PS7110-VI-A' PDF : 82 Pages View PDF
CL-PS7110
Low-Power System-on-a-Chip
3.2.11 SYSCON — System Control Register
The System Control register is a 24-bit read/write register that controls all the general configuration of the
CL-PS7110 as well as modes for peripheral devices. All bits in this register are cleared by a system reset.
The bits in SYSCON are defined in Table 3-3.
Table 3-3. Bits in SYSCON
7
TC2S
15
SIREN
23
6
5
TC2M
TC1S
14
13
CDENRX CDENTX
22
21
Reserved
4
TC1M
12
LCDEN
20
IRTXM
3
Keyboard scan
11
10
DBGEN
BZMOD
19
18
WAKEDIS EXCKEN
0
9
8
BZTOG
UARTEN
17
16
ADCKSEL
Keyboard Scan is a 4-bit field that defines the state of the keyboard column drives, as shown in Table 3-4.
Table 3-4. Keyboard Scan Field
Keyboard Scan
Column
0a
1a
2–7a
8
9
10
11
12
13
14
15
All driven high
All driven low
All high impedance (tristate)
Column 0 only driven high all others high impedance
Column 1 only driven high all others high impedance
Column 2 only driven high all others high impedance
Column 3 only driven high all others high impedance
Column 4 only driven high all others high impedance
Column 5 only driven high all others high impedance
Column 6 only driven high all others high impedance
Column 7 only driven high all others high impedance
a Used for test purposes only.
May 1997
DATA BOOK v1.5
43
PROGRAMMING INTERFACE
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