I/O Memory Of Low-Speed (Osc1) Oscillation Circuit - Epson CMOS 32-Bit Single Chip Microcomputer S1C33L03 Technical Manual

I/O Memory of Low-Speed (OSC1) Oscillation Circuit

Table 6.3 lists the control bits of the low-speed (OSC1) oscillation circuit.
Register name Address Bit
Power control 0040180 D7
register (B) D6
D5
D4–3
D2
D1
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
P1 function 00402D4 D7
select register (B) D6
D5
D4
D3
D2
D1
D0
Port function 00402DF D7
extension (B) D6
register D5
D4
D3
D2
D1
D0
S1C33L03 FUNCTION PART
III PERIPHERAL BLOCK: LOW-SPEED (OSC1) OSCILLATION CIRCUIT
Table 6.3 Control Bits of Low-Speed (OSC1) Oscillation Circuit
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
– –
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
– reserved
CFP16 P16 function selection
CFP15 P15 function selection
CFP14 P14 function selection
CFP13 P13 function selection
CFP12 P12 function selection
CFP11 P11 function selection
CFP10 P10 function selection
CFEX7 P07 port extended function
CFEX6 P06 port extended function
CFEX5 P05 port extended function
CFEX4 P04 port extended function
CFEX3 P31 port extended function
CFEX2 P21 port extended function
CFEX1 P10, P11, P13 port extended
function
CFEX0 P12, P14 port extended function
Setting
CLKDT[1:0] Division ratio
1 1 1/8
1 0 1/4
0 1 1/2
0 0 1/1
1 On 0 Off
–
1 OSC3 0 OSC1
1 On 0 Off
1 On 0 Off
–
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.
–
1 EXCL5 0 P16
#DMAEND1
1 EXCL4 0 P15
#DMAEND0
1 FOSC1 0 P14
1 EXCL3 0 P13
T8UF3
1 EXCL2 0 P12
T8UF2
1 EXCL1 0 P11
T8UF1
1 EXCL0 0 P10
T8UF0
1 #DMAEND3 0 P07, etc.
1 #DMAACK3 0 P06, etc.
1 #DMAEND2 0 P05, etc.
1 #DMAACK2 0 P04, etc.
1 #GARD 0 P31, etc.
1 #GAAS 0 P21, etc.
1 DST0 0 P10, etc.
DST1 P11, etc.
DPC0 P13, etc.
1 DST2 0 P12, etc.
DCLK P14, etc.
EPSON
Init. R/W Remarks
0 R/W
0
1 R/W
0 – Writing 1 not allowed.
1 R/W
1 R/W
1 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
– – 0 when being read.
0 R/W
0 R/W
0 R/W Extended functions
(0x402DF)
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
1 R/W
1 R/W
B-III-6-5
A-1
B-III
OSC1