Z8F1680SH020SG Datasheet, PDF (39/412 Pages) Zilog, Inc. – High-Performance 8-Bit Microcontrollers

Z8 Encore! XP^® F1680 Series
Product Specification
14
2.3. Signal Descriptions
Table 4 describes the signals for each block on the F1680 Series MCU. To determine the
signals available for specific package styles, see the Pin Configurations chapter on page
10.
Table 4. Signal Descriptions
Signal Mnemonic I/O Description
General-Purpose I/O Ports A–E
PA[7:0]
I/O Port A: These pins are used for general-purpose I/O.
PB[5:0]
I/O Port B: These pins are used for GPIO.
PC[7:0]
I/O Port C: These pins are used for GPIO.
PD[7:0]
I/O Port D: These pins are used for GPIO. PD0 is output only.
PE[6:0]
I/O Port E: These pins are used for GPIO.
LIN-UART Controllers
TXD0/TXD1
O
RXD0/RXD1
I
CTS0/CTS1
I
DE0/DE1
O
I²C Controller
SCL
I/O
SDA
I/O
Transmit Data 0–1: These signals are the transmit output from the UART0/1
and IrDA0/1.
Receive Data 0–1: These signals are the receive input for the UART0/1 and
IrDA0/1.
Clear To Send 0–1: These signals are the flow control input for the UART0/1.
Driver Enable 0–1: These signals allow automatic control of external RS-485
drivers. These signals are approximately the inverse of the TXE (Transmit
Empty) bit in the UART Status 0/1 register. The DE0/1 signal can be used to
ensure the external RS-485 driver is enabled when data is transmitted by the
UART0/1.
I²C Serial Clock: The I²C Master supplies this signal. If the F1680 Series
MCU is the I²C Master, this pin is an output. If it is the I²C slave, this pin is an
input. When the GPIO pin is configured as an alternate function to enable the
SCL function, this pin is open-drain.
Serial Data: This open-drain pin transfers data between the I²C and an
external I²C Master/Slave. When the GPIO pin is configured as an alternate
function to enable the SDA function, this pin is open-drain.
ESPI Controller
SS
I/O
Slave Select: This signal can be an output or an input. If the F1680 Series
MCU is the SPI master, this pin can be configured as the Slave Select output.
If it is the SPI slave, this pin is the input slave select.
PS025015-1212
PRELIMINARY
Pin Description