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51
MB90570 Series
6. 8/16-bit up/down counter/timer
The 8/16-bit up/down counter/timer consists of six event input pins, two 8-bit up/down counters, two 8-bit
reload compare registers, and their controllers.
(1) Register configuration
000076
H
00007A
H
Up/down count register 1 (UDCR1)
Address
bit 7. . . . . . . . . . . . .
bit 15
bit 14
bit 13
bit 12
bit 11
bit 10
bit 9
bit 8
Initial value
00000000
B
D17
D16
D15
D14
D13
D12
D11
D10
(UDCR0)
R
R
R
R
R
R
R
R
Up/down count register 0 (UDCR0)
Address
bit 15. . . . . . . . . . . .
D06
D07
(UDCR1)
R
R
R
R
R
R
R
R
bit 7
bit 6
bit 5
bit 4
D04
D05
D02
D03
D00
D01
bit 3
bit 2
bit 1
bit 0
000070
H
Initial value
00000000
B
000071
H
Reload compare register 1 (RCR1)
Address
bit 7. . . . . . . . . . . . .
(RCR0)
bit 15
D17
bit 14
D16
bit 13
D15
bit 12
D14
bit 11
D13
bit 10
D12
bit 9
D11
bit 8
D10
Initial value
00000000
B
W
W
W
W
W
W
W
W
Reload compare register 0 (RCR0)
Address
bit 15. . . . . . . . . . . .
D06
D07
(RCR1)
W
W
W
W
W
W
W
W
bit 7
bit 6
bit 5
bit 4
D04
D05
D02
D03
D00
D01
bit 3
bit 2
bit 1
bit 0
000072
H
Initial value
00000000
B
000073
H
Counter status register 0, 1 (CSR0, CSR1)
bit 15. . . . . . . . . . . .
Address
(Reserved area)
000078
H
CITE
CSTR
R/W
R/W
R/W
R/W
R/W
R/W
R
R
bit 7
bit 6
bit 5
bit 4
CMPF
UDIE
UDFF
OVFF
UDF0
UDF1
bit 3
bit 2
bit 1
bit 0
000074
H
Initial value
00000000
B
Counter control register 0, 1 (CCRL0, CCRL1)
bit 15. . . . . . . . . . . .
Address
CTUT
—
—
(CCRH0, CCRH1)
R/W
R/W
R/W
R/W
R/W
R/W
R/W
bit 7
bit 6
bit 5
bit 4
RLDE
UCRE
CGSC
UDCC
CGE0
CGE1
bit 3
bit 2
bit 1
bit 0
Initial value
- 0000000
B
Counter control register 0 (CCRH0)
Address
bit 7. . . . . . . . . . . . .
bit 15
bit 14
bit 13
bit 12
bit 11
bit 10
bit 9
bit 8
Initial value
00000000
B
M16E
CDCF
CFIE
CLKS
CMS1
CMS0
CES1
CES0
(CCRL0)
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
000077
H
Counter control register 1 (CCRH1)
Address
bit 7. . . . . . . . . . . . .
bit 15
—
—
bit 14
bit 13
bit 12
bit 11
bit 10
bit 9
bit 8
Initial value
- 0000000
B
CDCF
CFIE
CLKS
CMS1
CMS0
CES1
CES0
(CCRL1)
R/W
R/W
R/W
R/W
R/W
R/W
R/W
00007B
H
R/W : Readable and writable
R : Read only
W : Write only
— : Undefined