UPD78F9234MC-5A4-A Renesas Electronics America, UPD78F9234MC-5A4-A Datasheet - Page 59

• 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: -

4.2.3
output mode by using port mode register 3 (PM3). When the P30 to P33 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 3 (PU3).
reset function.
P34 pin by using external resistor.
Pins P30 to P33 constitute a 4-bit I/O port with an output latch. Each bit of this port can be set to the input or
The P30 and P31 pins are also used for both timer I/O and external interrupt request input pin functions.
Generation of reset signal sets port 3 to the input mode.
P34 is a 1-bit input-only port. This pin is also used as a RESET pin, and when the power is turned on, this is the
For settings of alternate function, refer to CHAPTER 18 OPTION BYTE. When using P34 as input port, pull up the
Figures 4-4 to 4-7 show the block diagrams of port 3.
Port 3
PU3:
P3:
PM3:
RD:
WR
WR
WR
WR
RD
: Write signal
PORT
PU
PM
Pull-up resistor option register 3
Port register 3
Port mode register 3
Read signal
Output latch
Alternate
function
PM30
PU30
(P30)
PU3
PM3
P3
Figure 4-4. Block Diagram of P30
CHAPTER 4 PORT FUNCTIONS
User’s Manual U17446EJ5V0UD
V
DD
P-ch
P30/TI000/INTP0
57