Datasheet

R01DS0011EJ0101 Rev.1.01 Page 12 of 102
Oct 28, 2011
R8C/LA3A Group, R8C/LA5A Group, R8C/LA6A Group, R8C/LA8A Group 1. Overview
1.3 Block Diagrams
Figure 1.5 shows a Block Diagram of R8C/LA3A Group. Figure 1.6 shows a Block Diagram of R8C/LA5A Group.
Figure 1.7 shows a Block Diagram of R8C/LA6A Group. Figure 1.8 shows a Block Diagram of R8C/LA8A Group.
Figure 1.5 Block Diagram of R8C/LA3A Group
Watchdog timer
(14 bits)
System clock generation
circuit
XIN-XOUT
High-speed on-chip oscillator
Low-speed on-chip oscillator
XCIN-XCOUT
RAM
(2)
Multiplier
Timers
Timer RB (8 bits × 2)
Timer RC (16 bits × 1)
Timer RH
Timer RJ (16 bits × 2)
R8C CPU core
Memory
R0H R0L
R1H
R2
R3
R1L
A0
A1
FB
SB
USP
ISP
INTB
PC
FLG
I/O ports
A/D converter
(10 bits
× 5 channels)
UART or
clock synchronous serial I/O
(8 bits × 1)
I
2
C bus or SSU
(8 bits × 1)
ROM
(1)
Peripheral functions
LCD drive control circuit
Common output: Max. 4 pins
Segment output: Max. 11 pins
Temperature Sensor
Comparator B 1 ch
Notes:
1. ROM capacity varies with MCU type.
2. RAM capacity varies with MCU type.
2
Port P9
8
Port P8
1
Port P7
Port P5
7
Port P2
8
Voltage detection circuit
Low-speed on-chip oscillator
for watchdog timer