Fig. 8.2 Block Diagram Of Pins Of Port 1 - Fujitsu MB90420/5 (A) Series Hardware Manual

MB90420/5 (A) SERIES F
n Block diagram of pins of port 1
Figure 8.2 shows the block diagram of the pins of port 1.
PDR (port data register)
PDR read
PDR write
DDR (port direction register)
DDR write
DDR read
n Registers for port 1
The registers for port 1 are PDR1 and DDR1. The bits composing each register correspond to the pins of
port 1 1-to-1. Table 8-8 shows the correspondence between the registers and pins of port 1.
Table 8-8 Correspondence between Registers and Pins for Port 1
Port Name
PDR1, DDR1
Port 1
Corresponding pin
2
MC-16LX FAMILY 16-BIT MICROCONTROLLERS HARDWARE MANUAL
Resource input
Output latch
Direction latch

Fig. 8.2 Block Diagram of Pins of Port 1

Bits of Related Registers and Corresponding Pins
bit 15 bit 14
P17 P16
Resource output
Resource output enable
Standby control (SPL = 1)
bit 13 bit 12
P15 P14
8-12
bit 11 bit 10 bit 9
P13 P12 P11
Pin
bit 8
P10