M38227ECFP Renesas Electronics America, M38227ECFP Datasheet - Page 17

• Manufacturer Part Number: M38227ECFP
• Description: IC 740 MCU EPROM 48K 80QFP
• Manufacturer: Renesas Electronics America
• Series: 740/38000r

Specifications of M38227ECFP

• Core Processor: 740
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: SIO, UART/USART
• Peripherals: LCD
• Number Of I /o: 49
• Program Memory Size: 48KB (48K x 8)
• Program Memory Type: OTP
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 2.5 V ~ 5.5 V
• Data Converters: A/D 8x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 80-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

[CPU Mode Register (CPUM)] 003B
The CPU mode register contains the stack page selection bit and
the internal system clock selection bit.
The CPU mode register is allocated at address 003B
Fig. 11 Structure of CPU mode register
14
b7
16
16
.
b0
CPU mode register
(CPUM (CM) : address 003B
Processor mode bits
Stack page selection bit
Not used (returns “1” when read)
(Do not write “0” to this bit)
Port X
Main clock (X
Main clock division ratio selection bit
Internal system clock selection bit
b1 b0
0 : 0 page
1 : 1 page
0 : I/O port function (stop oscillating)
1 : X
0 : Oscillating
1 : Stopped
0 : f(X
1 : f(X
0 : X
1 : X
0
0
1
1
0 : Single-chip mode
1 :
0 :
1 :
C
CIN
IN
CIN
switch bit
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
IN
IN
–X
–X
–X
)/2 (high-speed mode)
)/8 (middle-speed mode)
OUT
Not available
COUT
COUT
IN
– X
selected (middle-/high-speed mode)
OUT
oscillating function
selected (low-speed mode)
MITSUBISHI MICROCOMPUTERS
) stop bit
16
)
3822 Group