Clg Fout Control Register - Epson S1C17M20 Technical Manual

CLG FOUT Control Register

Register name Bit
CLGFOUT 15–8 –
7
6–4 FOUTDIV[2:0]
3–2 FOUTSRC[1:0]
1
0
Bits 15–7 Reserved
Bits 6–4 FOUTDIV[2:0]
These bits set the FOUT clock division ratios.
Bits 3–2 FOUTSRC[1:0]
These bits select the FOUT clock sources.
CLGFOUT.
FOUTDIV[2:0] bits
0x7
0x6
0x5
0x4
0x3
0x2
0x1
0x0
Note: When the CLGFOUT.FOUTSRC[1:0] bits are set to 0x3, the FOUT output will be stopped in
SLEEP/HALT mode as SYSCLK is stopped.
Bit 1 Reserved
Bit 0 FOUTEN
This bit controls the FOUT clock external output.
1 (R/W): Enable external output
0 (R/W): Disable external output
Note: Since the FOUT signal generated is out of sync with writings to the CLGFOUT.FOUTEN bit,
a glitch may occur when the FOUT output is enabled or disabled.
S1C17M20/M21/M22/M23/M24/M25
TECHNICAL MANUAL (Rev. 1.0)
Bit name Initial
0x00
– 0
0x0
0x0
– 0
FOUTEN 0
Table 2.6.11 FOUT Clock Source and Division Ratio Settings
0x0
IOSCCLK
1/128
1/64
1/32
1/16
1/8
1/4
1/2
1/1
Seiko Epson Corporation
2 POWER SUPPLY, RESET, AND CLOCKS
Reset R/W
– R –
– R
H0 R/W
H0 R/W
– R
H0 R/W
CLGFOUT.FOUTSRC[1:0] bits
0x1 0x2
OSC1CLK OSC3CLK
1/32,768 1/128
1/4,096 1/64
1/1,024 1/32
1/256 1/16
1/8 1/8
1/4 1/4
1/2 1/2
1/1 1/1
Remarks
0x3
SYSCLK
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
1/1
2-21