Epson S1C33210 Technical Manual page 36

4 PERIPHERAL CIRCUITS
Register name Address Bit
Power control 0040180 D7
register (B) D6
D5
D4–3
D2
D1
D0
Prescaler clock 0040181 D7–1
select register (B) D0
Clock option 0040190 D7–4
register (B) D3
D2
D1
D0
Power control 004019E D7
protect register (B) D6
D5
D4
D3
D2
D1
D0
A-22
Name Function
CLKDT1 System clock division ratio
CLKDT0 selection
PSCON Prescaler On/Off control
– reserved
CLKCHG CPU operating clock switch
SOSC3 High-speed (OSC3) oscillation On/Off
SOSC1 Low-speed (OSC1) oscillation On/Off
– reserved
PSCDT0 Prescaler clock selection
– –
HLT2OP HALT clock option
8T1ON OSC3-stabilize waiting function
– reserved
PF1ON OSC1 external output control
CLGP7 Power control register protect flag
CLGP6
CLGP5
CLGP4
CLGP3
CLGP2
CLGP1
CLGP0
Setting
CLKDT[1:0] Division ratio
1 1
1 0
0 1
0 0
1 On 0 Off
–
1 OSC3 0 OSC1
1 On 0 Off
1 On 0 Off
–
1 OSC1 0 OSC3/PLL
–
1 On 0 Off
1 Off 0 On
–
1 On 0 Off
Writing 10010110 (0x96)
removes the write protection of
the power control register
(0x40180) and the clock option
register (0x40190).
Writing another value set the
write protection.
EPSON
Init. R/W Remarks
0 R/W
1/8 0
1/4
1/2
1/1
1 R/W
0 – Writing 1 not allowed.
1 R/W
1 R/W
1 R/W
0 –
0 R/W
– – 0 when being read.
0 R/W
1 R/W
0 – Do not write 1.
0 R/W
0 R/W
0
0
0
0
0
0
0
S1C33210 PRODUCT PART