Advertisement
6 I/O Ports (PPORT)
6.1 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.)
• Over voltage tolerant fail-safe design allowing interface with the signal without passing unnecessary current even
if a voltage exceeding V
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 6.1.1 shows the configuration of PPORT.
Item
Port groups included
Ports with general-purpose I/O
function (GPIO)
Ports with chattering filter function
Ports with interrupt function
Ports for debug function
Key-entry reset function
Peripheral I/O function 0 I/O control
Peripheral I/O function 1 I/O control
Peripheral I/O function 2 I/O control
Peripheral I/O function 3 I/O control
Clock
generator
Key-entry
reset signal
System reset
controller
Interrupt
controller
S1C17W15 TECHNICAL MANUAL
(Rev. 1.3)
is applied.
DD
Table 6.1.1 Port Configuration of S1C17W15
S1C17W15
100-pin package/chip
P0[6:0], P1[7:0], P2[7:0], P3[7:0],
Pd[4:0]
P0[6:0], P1[7:0], P2[7:0], P3[7:0],
Pd[4:0] (Pd2: output only)
P0[6:0], P1[7:0]
P0[6:0], P1[7:0], P2[7:0], P3[7:0] P0[6:0], P1[7:0], P2[7:0], P3[4:0]
PPORT
Pxy
Pxy
Pxy
PxSELy
PxyMUX[1:0]
PxOUTy
PxOENy
PxIENy
PxPDPUy
PxRENy
PxCHATENy
CLKSRC[1:0]
PxINy
CLKDIV[3:0]
DBRUN
CLK_PPORT
Key-entry
PxEDGEy
reset control
circuit
PxINT
PxIFy
KRSTCFG[1:0]
PxIEy
Figure 6.1.1 PPORT Configuration
Seiko Epson Corporation
S1C17W15
80-pin package
P0[6:0], P1[7:0], P2[7:0], P3[4:0],
Pd[4:0]
P0[6:0], P1[7:0], P2[7:0], P3[4:0],
Pd[4:0] (Pd2: output only)
P0[6:0], P1[7:0]
Pd[2:0]
Supported (P0[3:0])
GPIO/
peripheral I/O
GPIO function
function
switching
General-purpose
circuit
I/O control
Chattering
filter
Interrupt
control circuit
Exist only in the ports that supports the interrupt function.
6 I/O PORTS (PPORT)
S1C17W15
64-pin package
P0[6:0], P1[7:0], P2[7:0],
Pd[4:0]
P0[6:0], P1[7:0], P2[7:0],
Pd[4:0] (Pd2: output only)
P0[6:0], P1[7:0]
P0[6:0], P1[7:0], P2[7:0]
I/O cell
control signal
Output signal
I/O cell
Input signal
Pxy
6-1
Advertisement
