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ADuC7060
GENERAL-PURPOSE I/O
The ADuC7060 features up to 16 general-purpose bidirectional
input/output (GPIO) pins. In general, many of the GPIO pins have
multiple functions that are configurable by user code. By default,
the GPIO pins are configured in GPIO mode. All GPIO pins have
an internal pull-up resistor with a drive capability of 1.6 mA.
All I/O pins are 3.3 V tolerant, meaning the GPIOs support an
input voltage of 3.3 V.
When the ADuC7060 enters a power-saving mode, the GPIO
pins retain their state.
The GPIO pins are grouped into three port buses.
Table 106 lists all the GPIO pins and their alternative functions.
A GPIO pin alternative function can be selected by writing to
the correct bits of the GPxCON register.
Table 106. GPIO Multifunction Pin Descriptions
Configuration via GPxCON
Port
0
1
2
Pin Mnemonic
P0.0/SS
P0.1/SCLK/SCL
P0.2/MISO
P0.3/MOSI/SDA
P0.4/IRQ0/PWM1
P0.5/CTS
P0.6/RTS
P1.0/IRQ1/SIN/T0
P1.1/SOUT
P1.2/SYNC
P1.3/TRIP
P1.4/PWM2
P1.5/PWM3
P1.6/PWM4
P2.0/IRQ2/PWM0/EXTCLK
P2.1/IRQ3/PWM5
00
GPIO
GPIO
GPIO
GPIO
GPIO/IRQ0
GPIO
GPIO
GPIO/IRQ1
GPIO
GPIO
GPIO
GPIO
GPIO/IRQ3
GPIO
GPIO/IRQ2/EXTCLK
GPIO/IRQ3
01
SS (SPI slave select).
SCLK/SCL (serial clock/SPI clock).
MISO (SPI—master in/slave out).
MOSI (SPI—master out/slave in).
PWM1 (PWM Input 1).
CTS. UART clear to send pin.
RTS. UART request to send pin.
SIN (serial input).
SOUT (serial output).
PWMsync (PWM sync input pin).
PWMtrip (PWM trip input pin).
PWM2 (PWM Input 2).
PWM3 (PWM Input 3).
PWM4 (PWM Input 4).
PWM0 (PWM Input 0).
PWM5 (PWM Input 5).
GPxCON REGISTERS
GPxCON are the Port x (where x is 0, 1, or 2) control registers, which select the function of each pin of Port x as described in Table 108.
Table 107.GPxCON Registers
Name
GP0CON0
GP1CON
GP2CON
Address
0xFFFF0D00
0xFFFF0D04
0xFFFF0D08
Default Value
0x00000000
0x00000000
0x00000000
Access
R/W
R/W
R/W
Rev. 0 | Page 96 of 100
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