HD6473847RHV Datasheet, PDF (250/546 Pages) Renesas Technology Corp – Renesas 8-Bit Single-Chip Microcomputer H8 Family / H8/300L Super Low Power Series

Section 9 Timers
φ_W
1/4
φ_W/4
PSW
TMA
φ_W/128
φ/8192, φ/4096,
φ/2048, φ/512,
φ/256, φ/128,
φ/32, φ/8
TCA
φ
PSS
Legend:
TMA: Timer mode register A
TCA: Timer counter A
IRRTA: Timer A overflow interrupt request flag
PSW: Prescaler W
PSS: Prescaler S
Note: * Can be selected only when the prescaler W output (φ_W/128) is used as the TCA input clock.
Figure 9.1 Block Diagram of Timer A
IRRTA
9.2.2 Register Descriptions
The timer A has the following registers.
• Timer mode register A (TMA)
• Timer counter A (TCA)
Timer Mode Register A (TMA): TMA selects the operating mode, the divided clock output, and
the input clock.
Initial
Bit
Bit Name Value R/W Description
7 to 5 ⎯
⎯
W
Reserved
The write value should always be 0.
Rev. 7.00 Mar. 08, 2010 Page 218 of 510
REJ09B0024-0700