M38517F8FP Renesas Electronics America, M38517F8FP Datasheet - Page 12

• Manufacturer Part Number: M38517F8FP
• Description: MCU 8-Bit 740 CISC 32KB Flash 5V 42-Pin SSOP
• Manufacturer: Renesas Electronics America

Specifications of M38517F8FP

• Package: 42SSOP
• Family Name: 740
• Maximum Speed: 8 MHz
• Ram Size: 1 KB
• Program Memory Size: 32 KB
• Operating Supply Voltage: 5 V
• Data Bus Width: 8 Bit
• Program Memory Type: Flash
• Number Of Programmable I/os: 34
• Interface Type: I2C-BUS
• On-chip Adc: 5-chx10-bit
• Operating Temperature: -20 to 85 °C
• Number Of Timers: 4

[CPU Mode Register (CPUM)] 003B
The CPU mode register contains the stack page selection bit, etc.
The CPU mode register is allocated at address 003B
Fig. 7 Structure of CPU mode register
3851 Group
Rev.1.01
Oct 15, 2003
b 7
(Built-in 24 KB or more ROM)
page 10 of 89
1
16
16
.
b0
CPU mode register
(
CPUM : address
Processor mode bits
Stack page selection bit
Fix this bit to “1”.
Port X
Main clock (X
Main clock division ratio selection bits
b1 b0
b7 b6
0
0
1
1
0 : 0 page
1 : 1 page
0
0
1
1
0 : I/O port function (stop oscillating)
1 : X
0 : Oscillating
1 : Stopped
0 : Single-chip mode
1 :
0 :
1 :
C
0 :
1 :
0 :
1 : Not available
CIN
switch bit
–X
= f(X
= f(X
= f(X
Not available
COUT
IN
003B
–X
IN
IN
CIN
OUT
)/2 (high-speed mode)
)/8 (middle-speed mode)
oscillating function
)/2 (low-speed mode)
16
) stop bit
)