APPENDIX A LIST OF I/O REGISTERS
S1C33L26 TECHNICAL MANUAL
Seiko Epson Corporation
AP-A-11
Register name Address
Bit
Name
Function
Setting
Init. R/W
Remarks
PLL Control
Register 0
(CMU_
PLLCTL0)
0x300108
(8 bits)
D7–4 PLLN[3:0]
PLL multiplication rate setup
PLLN[3:0] Multiplication rate 0x0 R/W Write-protected
0xf
0xe
0xd
0xc
0xb
0xa
0x9
0x8
0x7
0x6
0x5
0x4
0x3
0x2
0x1
0x0
x16
x15
x14
x13
x12
x11
x10
x9
x8
x7
x6
x5
x4
x3
x2
x1
D3–2 PLLV[1:0]
PLL V-divider setup
PLLV[1:0]
W
0x1 R/W
0x3
0x2
0x1
0x0
8
4
2
Not allowed
D1
–
reserved
–
–
–
0 when being read.
D0
PLLPOWR PLL enable
1 Enable
0 Disable
0
R/W Write-protected
PLL Control
Register 1
(CMU_
PLLCTL1)
0x300109
(8 bits)
D7–4 PLLVC[3:0] PLL VCO Kv setup
PLLVC[3:0]
f
VCO
[MHz]
0x1 R/W Write-protected
0x8
0x7
0x6
0x5
0x4
0x3
0x2
0x1
Other
360 < f
VCO
≤
400
320 < f
VCO
≤
360
280 < f
VCO
≤
320
240 < f
VCO
≤
280
200 < f
VCO
≤
240
160 < f
VCO
≤
200
120 < f
VCO
≤
160
100
≤
f
VCO
≤
120
Not allowed
D3–0 PLLRS[3:0] PLL LPF resistance setup
PLLRS[3:0]
f
REFCK
[MHz]
0x8 R/W
0xa
0x8
Other
5
≤
f
REFCK
< 20
20
≤
f
REFCK
≤
150
Not allowed
PLL Control
Register 2
(CMU_
PLLCTL2)
0x30010a
(8 bits)
D7–6 PLLCS[1:0] PLL LPF capacitance
0x0
0x0
R
D5
PLLBYP
PLL bypass mode
0
0
R
D4–0 PLLCP[4:0] PLL charge pump current
0x10
0x10
R
SSCG Macro
Control Register
0
(CMU_SSCG0)
0x30010c
(8 bits)
D7–1 –
reserved
–
–
–
0 when being read.
D0
SSMCON
SSCG enable
1 Enable
0 Disable
0
R/W Write-protected
SSCG Macro
Control Register
1
(CMU_SSCG1)
0x30010d
(8 bits)
D7–4 SSMCITM
[3:0]
SSCG interval timer (ITM)
setting
0x0 to 0xf
X
R/W Write-protected
D3–0 SSMCIDT
[3:0]
SSCG maximum frequency
change width setting
0x0 to 0xf
X
R/W
CMU Write
Protect Register
(CMU_
PROTECT)
0x300110
(8 bits)
D7–0 CMUP[7:0] CMU register write-protect flag
Writing 10010110 (0x96)
removes the write protection of
the CMU registers (0x300100–
0x30010d).
Writing another value set the
write protection.
0x0 R/W Write-protected
0x300210–0x30022c
Interrupt Controller (ITC)
Register name Address
Bit
Name
Function
Setting
Init. R/W
Remarks
FPT0–3
Interrupt Level
Register
(ITC_FPT03_LV)
0x300210
(8 bits)
D7–3 –
reserved
–
–
–
0 when being read.
D2–0 INT_LV[2:0] FPT0–3 interrupt level
1 to 7
0x0 R/W
FPT4–7
Interrupt Level
Register
(ITC_FPT47_LV)
0x300211
(8 bits)
D7–3 –
reserved
–
–
–
0 when being read.
D2–0 INT_LV[2:0] FPT4–7 interrupt level
1 to 7
0x0 R/W
FPT8–B
Interrupt Level
Register
(ITC_FPT8B_LV)
0x300212
(8 bits)
D7–3 –
reserved
–
–
–
0 when being read.
D2–0 INT_LV[2:0] FPT8–B interrupt level
1 to 7
0x0 R/W