UPD78F9234MC-5A4-A Renesas Electronics America, UPD78F9234MC-5A4-A Datasheet - Page 65

• 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: -

4.2.5
port mode register 12 (PM12). When the P120 and P123 pins are used as an input port, an on-chip pull-up resistor
can be connected by using pull-up resistor option register 12 (PU12).
P121 and P122 pins differ, therefore, depending on the selected system clock oscillator. The following three system
clock oscillators can be used.
(1) High-speed internal oscillator
(2) Crystal/ceramic oscillator
Port 12 is a 4-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 P121 and P122 pins are also used as the X1 and X2 pins of the system clock oscillator. The functions of the
The P121 and P122 pins can be used as I/O port pins.
The P121 and P122 pins cannot be used as I/O port pins because they are used as the X1 and X2 pins.
Port 12
WR
PU4:
P4:
PM4:
RD:
WR
WR
WR
RD
PORT
PU
PM
: Write signal
Pull-up resistor option register 4
Port register 4
Port mode register 4
Read signal
Output latch
Alternate
Alternate
function
function
PM43
PU43
(P43)
PU4
PM4
P4
Figure 4-11. Block Diagram of P43
CHAPTER 4 PORT FUNCTIONS
User’s Manual U17446EJ5V0UD
V
DD
P-ch
P43/TxD6/INTP1
63