HD4074329S Renesas Electronics America, HD4074329S Datasheet - Page 66

• Manufacturer Part Number: HD4074329S
• Description: MCU 4-Bit HMCS400 CISC 20KB EPROM 3.3V/5V 64-Pin SDIP
• Manufacturer: Renesas Electronics America

Specifications of HD4074329S

• Package: 64SDIP
• Family Name: HMCS400
• Maximum Speed: 4.5 MHz
• Ram Size: 268 Byte
• Program Memory Size: 20 KB
• Operating Supply Voltage: 3.3|5 V
• Data Bus Width: 4 Bit
• Program Memory Type: EPROM
• Number Of Programmable I/os: 35
• On-chip Adc: 4-chx8-bit
• Operating Temperature: -20 to 75 °C
• Number Of Timers: 3

HD404328 Series
Table 29
LCR
Bit 2
0
1
Note: When using an LCD in watch mode or subactive mode, use the divided output of a 32-kHz oscillator
LCD Duty Cycle/Clock Control Register (LMR: $014): Four-bit write-only register which selects the
display duty cycle and LCD clock source, as shown in table 30. The dependence of frame frequency on
duty cycle is shown in table 31.
Table 30
LMR
Bit 3
—
0
1
Note: f
62
as the LCD clock and set bit 2 of the LCR to 1. If using the divided output of the system clock as the
LCD clock, always set bit 2 of the LCR to 0.
cyc
Display in Watch Mode or
Subactive Mode
Off
On
Bit 2
—
0
1
0
1
is the divided system clock output.
LCD Control Register
LCD Duty Cycle/Clock Control Register
Bit 1
0
1
—
Bit 0
0
1
0
1
—
LCR
Bit 1
0
1
Duty Selection/Input Clock Selection
1/4 duty cycle
1/3 duty cycle
1/2 duty cycle
Static
CL0 (32.768/64 kHz when using a 32.768-kHz oscillator)
CL1 (f
CL2 (f
CL3 (refer to table 31)
cyc
cyc
/256)
/2048)
Power Switch On/Off
Off
On
LCR
Bit 0
0
1
Blank/Display
Blank
Display