Fig. 8.5 Block Diagram Of Pins Of Port 5 - Fujitsu MB90420/5 (A) Series Hardware Manual

n Block diagram of pins of port 5
Figure 8.5 shows the block diagram of the pins of port 5.
PDR (port data register)
PDR read
PDR write
DDR (port direction register)
DDR write
DDR read
n Registers for port 5
The registers for port 5 are PDR5 and DDR5. The bits composing each register correspond to the pins of
port 5 1-to-1. Table 8-20 shows the correspondence between the registers and the pins for port 5.
Table 8-20 Correspondence between Registers and Pins for Port 5
Port Name
PDR5, DDR5
Port 5
Corresponding pin
Resource input
Output latch
Direction latch

Fig. 8.5 Block Diagram of Pins of Port 5

Bits of Related Registers and Corresponding Pins
bit 15 bit 14
P57
I/O PORT
Resource output
Standby control (SPL = 1)
bit 13 bit 12
P56 P55 P54
8-27
Resource output enable
bit 11 bit 10 bit 9
P53 P52 P51
Pin
bit 8
P50