HD6413308 Hitachi Semiconductor, HD6413308 Datasheet - Page 151

• Manufacturer Part Number: HD6413308
• Description: Hitachi Single-Chip MicroComputer
• Manufacturer: Hitachi Semiconductor

Bit 1
CKS1
0
0
1
1
6.2.7 Timer Output Compare Control Register (TOCR) – H’FF97
Bit
Initial value
Read/Write
The TOCR is an 8-bit readable/writable register that controls the output compare function.
The TOCR is initialized to H’E0 at a reset and in the standby modes.
Bits 7 to 5 – Reserved: These bits cannot be modified and are always read as “1.”
Bit 4 – Output Compare Register Select (OCRS): When the CPU accesses addresses H’FF94
and H’FF95, this bit directs the access to either OCRA or OCRB. These two registers share the
same addresses as follows:
Upper byte of OCRA and upper byte of OCRB: H’FF94
Lower byte of OCRA and lower byte of OCRB: H’FF95
Bit 4
OCRS
Bit 3 – Output Enable A (OEA): This bit enables or disables output of the output compare A
signal (FTOA). When output compare A is disabled, the corresponding pin is used as a general-
purpose input/output port.
Bit 3
OEA
0
1
0
1
Description
The CPU can access OCRA.
The CPU can access OCRB.
Description
Output compare A output is disabled.
Output compare A output is enabled.
Bit 0
CKS0
0
1
0
1
—
—
7
1
Description
Ø/2 Internal clock source
Ø/8 Internal clock source
Ø/32 Internal clock source
External clock source (rising edge)
—
—
6
1
—
—
5
1
OCRS
136
R/W
4
0
OEA
R/W
3
0
OEB
R/W
2
0
OLVLA OLVLB
R/W
1
0
(Initial value)
(Initial value)
(Initial value)
R/W
0
0