7 ClOCK GeneRaTOR (ClG)
S1C17153 TeChniCal Manual
Seiko epson Corporation
7-11
(Rev. 1.0)
FOuTB Control Register (ClG_FOuTB)
Register name address
Bit
name
Function
Setting
init. R/W
Remarks
FOuTB Control
Register
(ClG_FOuTB)
0x5065
(8 bits)
D7
–
reserved
–
–
–
0 when being read.
D6–4
FOuTBD
[2:0]
FOUTB clock division ratio select
FOUTBD[2:0]
Division ratio
0x0 R/W
0x7
0x6
0x5
0x4
0x3
0x2
0x1
0x0
1/128
1/64
1/32
1/16
1/8
1/4
1/2
1/1
D3–2
FOuTBSRC
[1:0]
FOUTB clock source select
FOUTBSRC[1:0] Clock source
0x0 R/W
0x3, 0x2
0x1
0x0
reserved
OSC1A
OSC3B
D1
–
reserved
–
–
–
0 when being read.
D0
FOuTBe
FOUTB output enable
1 Enable
0 Disable
0
R/W
D7
Reserved
D[6:4]
FOuTBD[2:0]: FOuTB Clock Division Ratio Select Bits
Selects the source clock division ratio to set the FOUTB clock frequency.
8.6 Clock Division Ratio Selection
Table 7.
FOuTBD[2:0]
Division ratio
0x7
1/128
0x6
1/64
0x5
1/32
0x4
1/16
0x3
1/8
0x2
1/4
0x1
1/2
0x0
1/1
(Default: 0x0)
D[3:2]
FOuTBSRC[1:0]: FOuTB Clock Source Select Bits
Selects the FOUTB clock source.
8.7 FOUTB Clock Source Selection
Table 7.
FOuTBSRC[1:0]
Clock source
0x3, 0x2
Reserved
0x1
OSC1A
0x0
OSC3B
(Default: 0x0)
D1
Reserved
D0
FOuTBe: FOuTB Output enable Bit
Enables or disables FOUTB clock external output.
1 (R/W): Enabled (on)
0 (R/W): Disabled (off) (default)
Setting FOUTBE to 1 outputs the FOUTB clock from the FOUTB pin. Setting it to 0 stops the output.
Oscillation Stabilization Wait Control Register (ClG_WaiT)
Register name address
Bit
name
Function
Setting
init. R/W
Remarks
Oscillation
Stabilization
Wait Control
Register
(ClG_WaiT)
0x507d
(8 bits)
D7–6
OSC3BWT
[1:0]
OSC3B stabilization wait cycle
select
OSC3BWT[1:0]
Wait cycle
0x0 R/W
0x3
0x2
0x1
0x0
8 cycles
16 cycles
32 cycles
64 cycles
D5–2
–
reserved
–
–
–
0 when being read.
D1–0
OSC1aWT
[1:0]
OSC1A stabilization wait cycle
select
OSC1AWT[1:0]
Wait cycle
0x0 R/W
0x3
0x2
0x1
0x0
reserved
4096 cycles
reserved
16384 cycles