W90P710_05 Datasheet, PDF (443/526 Pages) Winbond – 16/32-bit ARM microcontroller

W90P710
Smart Card Host Extended Control Register (SCHI_ECR)
REGISTER
SCHI_ECR0
SCHI_ECR1
ADDRESS
0xFFF8_501C
0xFFF8_581C
R/W
DESCRIPTION
R/W Extended Control Register 0
R/W Extended Control Register 1
RESET VALUE
0x0000_0052
0x0000_0052
31
30
23
22
15
14
7
Reserved
6
SCKFS2
29
21
13
5
SCKFS1
28
27
RESERVED
20
19
RESERVED
12
11
RESERVED
4
3
SCKFS0 CLKSTP
26
18
10
2
CLKSTPL
25
24
17
16
9
8
1
0
Reserved
BITS
[31:7]
[6:4]
[3]
[2]
[1:0]
RESERVED
SCKFS2,
SCKFS1,
SCKFS0
CLKSTPL
CLKSTP
RESERVED
DESCRIPTIONS
-
SCCLK Frequency Selection bit 2, 1 and 0.
They select working clock frequency as following table. Default values
are 05h.
SCKFS0, SCKFS1, SCKFS2
SCCLK
frequency
000
80MHz
001
40 MHz
010
20 MHz
011
10 MHz
100
5 MHz
101
2.5 MHz
110
1.25 MHz
Clock Stop voltage Level
0 = SCCLK stops at low if CLKSTP is also set to "0".
1 = SCCLK stops at high if CLKSTP is also set to "1".
Clock Stop control bit
Setting "1" to this bit stops SCCLK at a voltage level specified by
CLKSTPL (bit 3 of ECR).
-
- 443 -
Publication Release Date: January 17, 2005
Revision A.2