Port 4 - Fujitsu MB90460 Series Hardware Manual

CHAPTER 9 I/O PORT
9.7

Port 4

Port 4 is a general-purpose I/O port. It can also be used for resource I/O. The port pins
can be switched in units of bits between the I/O port and resource. This section
focuses on the general I/O port function. It provides the configuration of port 4, lists its
pins, shows a block diagram of the pins, and describes the corresponding registers.
■ Port 4 Configuration
Port 4 consists of the following:
• General-purpose I/O pins/resource I/O pins (P40/SIN0 to P46/PPG2)
• Port 4 data register (PDR4)
• Port 4 data direction register (DDR4)
■ Port 4 Pins
The port 4 I/O pins are also used as resource I/O pins. The pins cannot be used as general-purpose I/O port
pins when they are used as resource I/O pins. Table 9.7-1 lists the port 4 pins.
Table 9.7-1 Port 4 Pins
Port Pin
P40/SIN0
P41/SOT0
P42/SCK0
P43/SNI0*
Port 4
P44/SNI1*
P45/SNI2*
P46/PPG2
*: Pin names not applicable to MB90465 series
See "1.7 I/O Circuit Types", for information on the circuit types.
188
Port function
(single-chip mode)
P40 SIN0
P41 SOT0
P42 SCK0
P43 SNI0*
General-
purpose I/O
P44 SNI1*
P45 SNI2*
P46 PPG2
Resource function
UART 0 data input
UART 0 data output
UART 0 serial clock I/O
Waveform sequencer
input 0
Waveform sequencer
input 1
Waveform sequencer
input 2
PPG2 output
I/O form
Input Output
CMOS
CMOS
(hysteresis)
Circuit
type
F