Fig. 8.7 Block Diagram Of Pins Of Port 7 - Fujitsu MB90420/5 (A) Series Hardware Manual

n Block diagram of pins of port 7
Figure 8.7 shows the block diagram of the pins of port 7.
PDR (port data register)
PDR read
PDR write
DDR (port direction register)
DDR write
DDR read
When the output enable bit is set for a pin of the resource, the pin is forcibly set as an output pin of the
resource irrespective of the value of the DDR7 register.
n Registers for port 7
The registers for port 7 are PDR7 and DDR7. The bits composing each register's bits correspond to the pins
of port 7 1-to-1. Table 8-28 shows the correspondence between the registers and the pins for port 7.
Table 8-28 Correspondence between Registers and Pins for Port 7
Port Name
PDR7, DDR7
Port 7
Corresponding pin
Output latch
Direction latch

Fig. 8.7 Block Diagram of Pins of Port 7

Bits of Related Registers and Corresponding Pins
bit 15 bit 14
P77
I/O PORT
Resource output
Standby control (SPL = 1)
bit 13 bit 12
P76 P75 P74
8-37
Resource output enable
bit 11 bit 10 bit 9
P73 P72 P71
Pin
bit 8
P70