H8SXSLASH1663R datasheet(879/1504 Pages) RENESAS

879 / 1504 page

Section 17 32K Timer (TM32K)

Rev. 2.00 Sep. 24, 2008 Page 847 of 1468

REJ09B0412-0200

Bit

Bit Name

Initial

Value

R/W

Description

TME

R/W

Timer Enable

When this bit is set to 1, TCNT32K starts counting. When

this bit is cleared, TCNT32K stops counting and is

initialized to H'00_00_00.

4, 3



All 1

Reserved

These bits are always read as 1 and cannot be modified.

OSC32STP*

R/W

Subclock Oscillator Stop

0: Starts the subclock oscillator

1: Stops the subclock oscillator

Note:

When the CK32K bit in SUBCKCR is 1, 1 cannot be written to this bit.

17.2.2

Timer Counter (TCNT32K1, TCNT32K2, TCNT32K3)

The timer counter is a 24-bit counter for which either 8- or 24-bit operation is selectable.

Allocation to the registers of the timer counter differs according to the setting of the EXCKSN bit

in TCR32K.

(1)

EXCKSN = 1 (Initial State)

The timer counter operates as an 8-bit counter. Only TCNT32K1 is used and TCNT32K2 and

TCNT32K3 become reserved registers. Clearing the TME bit in the timer control register

(TCR32K) initializes TCNT32K1 to H'00.

• TCNT32K1

Bit

Bit Name

Initial value

R/W

TCNT7

TCNT6

TCNT5

TCNT4

TCNT3

TCNT2

TCNT1

TCNT0

• TCNT32K2

Bit

Bit Name

Initial value

R/W



H8SX/1663R Datasheet(PDF) 879 Page - Renesas Technology Corp

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