hd64338023s Renesas Electronics Corporation., hd64338023s Datasheet - Page 354

• Manufacturer Part Number: hd64338023s
• Description: Renesas 8-bit Single-chip Microcomputer Super Low Power Series
• Manufacturer: Renesas Electronics Corporation.

Section 9 Timers
Block Diagram
Figure 9.19 shows a block diagram of the asynchronous event counter.
Rev. 7.00 Mar 10, 2005 page 312 of 652
REJ09B0042-0700
IRQAEC
AEVH
AEVL
[Legend]
ECPWCRH: Event counter PWM compare register H
ECPWDRH: Event counter PWM data register H
AEGSR:
ECCSR:
ECH:
ECL:
Edge sensing
Edge sensing
circuit
circuit
Figure 9.19 Block Diagram of Asynchronous Event Counter
φ
φ/2
φ/4, φ/8
Input pin edge select register
Event counter control/status register
Event counter H
Event counter L
PSS
φ/2, φ/4,
φ/8, φ/16,
φ/32, φ/64
AEGSR
Edge sensing
circuit
ECCR
ECPWCRL: Event counter PWM compare register L
ECPWDRL: Event counter PWM data register L
ECCR:
ECPWCRH
ECPWDRH
OVL
Event counter control register
PWM waveform generator
OVH
To CPU interrupt
(IRREC2)
ECPWCRL
ECPWDRL
ECCSR
(8 bits)
(8 bits)
ECH
ECL
IRREC
CK
CK