7545 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
REJ03B0140-0106
Rev.1.06
Mar 07, 2008
DESCRIPTION
• Clock generating circuit ........................................Built-in type
(connect to external ceramic resonator or quartz-crystal
oscillator)
• Watchdog timer .........................................................16-bit × 1
• Power-on reset circuit............................................ Built-in type
• Voltage drop detection circuit................................Built-in type
• Power source voltage
The 7545 Group is the 8-bit microcomputer based on the 740
family core technology.
The 7545 Group has an 8-bit timer, power-on reset circuit and the
voltage drop detection circuit. Also, Function set ROM is
equipped.
XIN oscillation frequency at ceramic/quartz-crystal oscillation
At 4 MHz.......................................... 1.8 to 3.6 V
FEATURES
• Power dissipation .......................................................... 1.8mW
• Operating temperature range.................................−20 to 85 °C
• Basic machine-language instructions .................................. 71
• The minimum instruction execution time .................... 2.00 µs
(at 4 MHz oscillation frequency for the shortest instruction)
• Memory size ROM ........................................ 4K to 60K bytes
RAM ............................................ 256, 512 bytes
• Programmable I/O ports ...................................................... 25
• Key-on wakeup input .................................................. 8 inputs
• LED output port...................................................................... 8
• Interrupts.................................................... 7 sources, 7 vectors
• Timers .......................................................................... 8-bit × 3
• Carrier wave generating circuit .......1 channel (8-bit timer × 2)
APPLICATION
Remote control transmit.
PIN CONFIGURATION (TOP VIEW)
22
24 23
21 20 19 18 17
25
26
27
28
29
30
31
32
16
P05/KEY5
P06/KEY6
P07/KEY7
P34
15
P33
14
P32
13
P20(LED0)/INT0
P21(LED1)/INT1
P22(LED2)
P31
M37545Gx-XXXGP
M37545GxGP
12
11
10
9
P30
VSS
P23(LED3)
P24(LED4)
XOUT
XIN
7
8
1
2
3
4
5
6
Package type: PLQP0032GB-A (32P6U-A)
Fig. 1 Pin configuration (PLQP0032GB-A type)
Rev.1.06 Mar 07, 2008 Page 1 of 59
REJ03B0140-0106