HD6433044 Hitachi Semiconductor, HD6433044 Datasheet - Page 439
HD6433044
Manufacturer Part Number
HD6433044
Description
(HD64 Series) Hitachi Single-Chip Microcomputer
Manufacturer
Hitachi Semiconductor
Datasheet
1.HD6433044.pdf
(867 pages)
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Bits 2 to 0—Clock Select 2 to 0 (CKS2/1/0): These bits select one of eight internal clock
sources, obtained by prescaling the system clock (ø), for input to TCNT.
Bit 2
CKS2
0
1
12.2.3 Reset Control/Status Register (RSTCSR)
RSTCSR is an 8-bit readable and writable
generated by watchdog timer overflow, and controls external output of the reset signal.
Bits 7 and 6 are initialized by input of a reset signal at the RES pin. They are not initialized by
reset signals generated by watchdog timer overflow.
Notes: 1. RSTCSR differs from other registers in being more difficult to write. For details see
Bit
Initial value
Read/Write
2. Only 0 can be written in bit 7, to clear the flag.
Bit 1
CKS1
0
1
0
1
section 12.2.4, Notes on Register Access.
Watchdog timer reset
Indicates that a reset signal has been generated
R/(W)
WRST
Bit 0
CKS0
0
1
0
1
0
1
0
1
7
0
*
2
Reset output enable
Enables or disables external output of the reset signal
RSTOE
R/W
ø/2
ø/256
Description
ø/32
ø/64
ø/128
ø/512
ø/2048
ø/4096
6
0
—
—
5
1
*1
register that indicates when a reset signal has been
427
—
—
4
1
Reserved bits
—
—
3
1
—
—
2
1
—
—
1
1
(Initial value)
—
—
0
1
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