Register Descriptions; Timer Output Control Register (Tocr) - Hitachi SH7750 Hardware Manual

12.2

Register Descriptions

12.2.1

Timer Output Control Register (TOCR)

TOCR is an 8-bit readable/writable register that specifies whether external pin TCLK is used as
the external clock or input capture control input pin, or as the on-chip RTC output clock output
pin.
TOCR is initialized to H'00 by a power-on or manual reset, but is not initialized in standby mode.
Bit:
Initial value:
R/W:
Bits 7 to 1—Reserved: These bits are always read as 0. A write to these bits is invalid, but the
write value should always be 0.
Bit 0—Timer Clock Pin Control (TCOE): Specifies whether timer clock pin TCLK is used as
the external clock or input capture control input pin, or as the on-chip RTC output clock output
pin.
Bit 0: TCOE
0
1
Note: * Low level output in standby mode.
7 6
— —
0 0
R R
Description
Timer clock pin (TCLK) is used as external clock input or input capture
control input pin
Timer clock pin (TCLK) is used as on-chip RTC output clock output pin*
5 4 3
— — —
0 0 0
R R R
2 1
— —
0 0
R R
(Initial value)
Rev. 6.0, 07/02, page 295 of 986
0
TCOE
0
R/W