HD6475328-CP10 HITACHI [Hitachi Semiconductor], HD6475328-CP10 Datasheet - Page 228
HD6475328-CP10
Manufacturer Part Number
HD6475328-CP10
Description
original Hitachi CMOS microcomputer unit (MCU)
Manufacturer
HITACHI [Hitachi Semiconductor]
Datasheet
1.HD6475328-CP10.pdf
(459 pages)
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Bits 2, 1, and 0—Clock Select (CKS2, CKS1, and CKS0): These bits select the internal or
external clock source for the timer counter. For the external clock source they select whether to
increment the count on the rising or falling edge of the clock input, or on both edges.
Bit 2
CKS2
0
0
0
0
1
1
1
1
11.2.4 Timer Control/Status Register (TCSR)
Bit
Initial value
Read/Write
The TCSR is an 8-bit readable and partially writable* register that indicates compare-match and
overflow status and selects the effect of compare-match events on the timer output signal (TMO).
The TCSR is initialized to H'10 at a reset and in the standby modes.
* Software can write a “0” in bits 7 to 5 to clear the flags, but cannot write a “1” in these bits.
Bit 7—Compare-Match Flag B (CMFB): This status flag is set to “1” when the timer count
matches the time constant set in TCORB.
Bit 1
CKS1
0
0
1
1
0
0
1
1
R/(W)*
CMFB
7
0
Bit 0
CKS0
0
1
0
1
0
1
0
1
R/(W)*
CMFA
6
0
Description
No clock source (timer stopped).
Internal clock source (ø/8).
Internal clock source (ø/64).
Internal clock source (ø/1024).
No clock source (timer stopped).
External clock source, counted on the rising edge.
External clock source, counted on the falling edge.
External clock source, counted on both the rising
and falling edges.
R/(W)*
OVF
5
0
212
—
—
4
1
OS3
R/W
3
0
OS2
R/W
2
0
(Initial value)
OS1
R/W
1
0
OS0
R/W
0
0
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