M38227ECFP Renesas Electronics America, M38227ECFP Datasheet - Page 40

• 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: -

LCD Display RAM
Address 0040
play. When “1” are written to these addresses, the corresponding
segments of the LCD display panel are turned on.
Fig. 35 LCD display RAM map
16
to 004F
16
is the designated RAM for the LCD dis-
A d d r e s s
0 0 4 0
0 0 4 1
0 0 4 2
0 0 4 3
0 0 4 4
0 0 4 5
0 0 4 6
0 0 4 7
0 0 4 8
0 0 4 9
0 0 4 A
0 0 4 B
0 0 4 C
0 0 4 D
0 0 4 E
0 0 4 F
B i t
1 6
1 6
1 6
1 6
1 6
1 6
1 6
1 6
1 6
1 6
1 6
1 6
1 6
1 6
1 6
1 6
C O M
7
3
C O M
6
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
S E G
2
COM
1
3
5
7
9
1 1
1 3
1 5
1 7
1 9
2 1
2 3
2 5
2 7
2 9
3 1
5
1
C O M
4
LCD Drive Timing
The LCDCK timing frequency (LCD drive timing) is generated in-
ternally and the frame frequency can be determined with the
following equation;
0
f(LCDCK) =
Frame frequency =
COM
3
3
C O M
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
2
SEG
SEG
SEG
SEG
SEG
SEG
SEG
SEG
SEG
SEG
SEG
SEG
SEG
SEG
SEG
SEG
2
(frequency of count source for LCDCK)
COM
0
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
1
(divider division ratio for LCD)
MITSUBISHI MICROCOMPUTERS
1
(duty ratio)
C O M
f(LCDCK)
0
0
3822 Group
37