UPD784026 Renesas Electronics Corporation., UPD784026 Datasheet - Page 126

• Manufacturer Part Number: UPD784026
• Description: 16/8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

86
Port Name
Port 0
Port 1
Port 2
Port 3
Port 4
Port 5
Port 6
Port 7
Input ports
Input/output ports
Output ports
Total
Ports
* In the PD784021, P60 to P63 operate only as output-only port pins.
Remark In the PD784021, P40-47, P50-57, P64, and P65 operate as the address/data bus, address bus, and RD and
Remark ( ):
Input/Output
P00 to P07
P10 to P17
P20 to P27
P30 to P37
P40 to P47
P50 to P57
P60 to P67*
P70 to P77
WR pins, respectively. Therefore, LED direct drive and internal software pull-up resistor specification are not
possible for these pins.
Pin Names
PD784021
56 (34)
64 (46)
Total
8 (8)
0 (4)
• Input or output specifiable bit-wise.
• Can also operate as 4-bit real-time output ports
• Transistor drive capability.
• Input or output specifiable bit-wise.
• LED drive capability.
Input port
Input or output specifiable bit-wise.
• Input or output specifiable bit-wise.
• LED drive capability.
• Input or output specifiable bit-wise.
• LED drive capability.
Input or output specifiable bit-wise.
Input or output specifiable bit-wise.
(P00 to P03, P04 to P07).
Software Pull-up Resistor
Table 5-2 Number of Input/Output Ports
Input Mode
CHAPTER 5 PORT FUNCTIONS
48 (26)
54 (32)
Table 5-1 Port Functions
6 (6)
—
Functions
Direct LED Drive
24 (8)
24 (8)
0 (0)
—
Input mode pins specified at once
6-bit unit (P22 to P27)
Input mode pins specified at once
SoftwarePull-up Specification
Output Mode
Direct Transistor Drive
—
0 (0)
8 (8)
8 (8)
—