Table of Contents
Advertisement
7 I/O Ports (PPORT)
7.1 Overview
PPORT controls the I/O ports. The main features are outlined below.
• Allows port-by-port function configurations.
- Each port can be configured with or without a pull-up or pull-down resistor.
- Each port can be configured with or without a chattering filter.
- Allows selection of the function (general-purpose I/O port (GPIO) function, up to four peripheral I/O func-
tions) to be assigned to each port.
• Ports, except for those shared with debug pins, are initially placed into Hi-Z state.
(No current passes through the pin during this Hi-Z state.)
Note: 'x', which is used in the port names Pxy, register names, and bit names, refers to a port group (x
= 0, 1, 2, ··· , d) and 'y' refers to a port number (y = 0, 1, 2, ··· , 7).
Figure 7.1.1 shows the configuration of PPORT.
Item
Port groups included
P0
P1
P2
P3
P4
P5
P6
Pd
Total number of ports
Ports for debug function
Key-entry reset function
*1 Ports with general-purpose I/O function (GPIO)
*2 Ports with interrupt function
S1C31D41 TECHNICAL MANUAL
(Rev. 1.1)
Table 7.1.1 Port Configuration of S1C31D41
32-pin package
–
(0)
P1[7:2]
(6)
*1, *2
P20
(1)
*1, *2
P3[2:1]
(2)
*1, *2
P4[4:2]
(3)
*1, *2
P54, P5[1:0]
(3)
*1, *2
P6[5:0]
(6)
*1, *2
Pd[3:0]
(4)
*1
25 ports
Seiko Epson Corporation
48-pin package
P0[6:2]
(5)
*1, *2
P1[7:2]
(6)
*1, *2
P2[3:0]
(4)
*1, *2
P3[5:1]
(5)
*1, *2
P4[5:2]
(4)
*1, *2
5[6:4], P5[1:0]
(5)
*1, *2
P6[5:0]
(6)
*1, *2
Pd[3:0]
(4)
*1
39 ports
Pd[1:0]
Unavailable
7 I/O PORTS (PPORT)
64-pin package
P0[7:0]
(8)
*1, *2
P1[7:0]
(8)
*1, *2
P2[7:0]
(8)
*1, *2
P3[7:0]
(8)
*1, *2
P4[5:0]
(6)
*1, *2
P5[6:0]
(7)
*1, *2
P6[5:0]
(6)
*1, *2
Pd[3:0]
(4)
*1
55 ports
7-1
Advertisement
Table of Contents
