Renesas H8/38024 Series, Hardware Manual

Page: 303 / 661

Rev. 6.00, 08/04, page 273 of 628
Pin Configuration
Table 9.10 shows the timer G pin configuration.
Table 9.10 Pin Configuration
Name Abbr. I/O Function
Input capture input TMIG Input Input capture input pin
Register Configuration
Table 9.11 shows the register configuration of timer G.
Table 9.11 Timer G Registers
Name Abbr. R/W Initial Value Address
Timer control register G TMG R/W H'00 H'FFBC
Timer counter G TCG — H'00 —
Input capture register GF ICRGF R H'00 H'FFBD
Input capture register GR ICRGR R H'00 H'FFBE
Clock stop register 1 CKSTPR1 R/W H'FF H'FFFA
9.5.2 Register Descriptions
Timer Counter G (TCG)
TCG7 TCG2 TCG1 TCG0 TCG6 TCG5 TCG4 TCG3
7 6 5 4 3 2 1 0
0 0 0 0 0 0 0 0
       
Bit:
Initial value:
Read/Write:
TCG is an 8-bit up-counter which is incremented by clock input. The input clock is selected by
bits CKS1 and CKS0 in TMG.
TMIG in PMR1 is set to 1 to operate TCG as an input capture timer, or cleared to 0 to operate
TCG as an interval timer*. In input capture timer operation, the TCG value can be cleared by the
rising edge, falling edge, or both edges of the input capture input signal, according to the setting
made in TMG.
When TCG overflows from H'FF to H'00, if OVIE in TMG is 1, IRRTG in IRR2 is set to 1, and if
IENTG in IENR2 is 1, an interrupt request is sent to the CPU.
For details of the interrupt, see section 3.3, Interrupts.