UPD78F9234MC-5A4-A Renesas Electronics America, UPD78F9234MC-5A4-A Datasheet - Page 62

• Manufacturer Part Number: UPD78F9234MC-5A4-A
• Description: MCU 8BIT 8KB FLASH 30PIN
• Manufacturer: Renesas Electronics America
• Series: 78K0S/Kx1+r

Specifications of UPD78F9234MC-5A4-A

• Core Processor: 78K0S
• Core Size: 8-Bit
• Speed: 10MHz
• Connectivity: LIN, UART/USART
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 24
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.5 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

4.2.4
port mode register 4 (PM4). When the P40 to P47 pins are used as an input port, an on-chip pull-up resistor can be
connected in 1-bit units by using pull-up resistor option register 4 (PU4).
output.
60
Port 4 is an 8-bit I/O port with an output latch. Each bit of this port can be set to the input or output mode by using
The P41 to P44 pins can also be used for external interrupt request input, serial interface data I/O, and timer
Generation of reset signal sets port 4 to the input mode.
Figures 4-8 to 4-11 show the block diagrams of port 4.
Port 4
WR
PU4:
P4:
PM4:
RD:
WR
WR
WR
RD
PORT
PM
PU
Also, since the option byte is referenced after the reset release, if low level is input to the RESET
pin before the referencing, then the reset state is not released. When it is used as an input port
pin, connect the pull-up resistor.
: Write signal
Pull-up resistor option register 4
Port register 4
Port mode register 4
Read signal
(P40, P45 to P47)
PM45 to PM47
PU45 to PU47
Output latch
PU40,
PM40,
PM4
PU4
P4
Figure 4-8. Block Diagram of P40, P45 to P47
CHAPTER 4 PORT FUNCTIONS
User’s Manual U17446EJ5V0UD
V
DD
P-ch
P40, P45 to P47