Z8F640x/Z8F480x/Z8F320x/Z8F240x/Z8F160x
Z8 Encore!®
13
Signal Descriptions
Table 2 describes the Z8F640x family signals. Refer to the section Pin Configurations on
page 7 to determine the signals available for the specific package styles.
Table 2. Signal Descriptions
Signal Mnemonic
I/O
Description
General-Purpose I/O Ports A-H
PA[7:0]
PB[7:0]
PC[7:0]
PD[7:0]
PE[7:0]
PF[7:0]
PG[7:0]
PH[3:0]
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
Port A[7:0]. These pins are used for general-purpose I/O.
Port B[7:0]. These pins are used for general-purpose I/O.
Port C[7:0]. These pins are used for general-purpose I/O.
Port D[7:0]. These pins are used for general-purpose I/O.
Port E[7:0]. These pins are used for general-purpose I/O.
Port F[7:0]. These pins are used for general-purpose I/O.
Port G[7:0]. These pins are used for general-purpose I/O.
Port H[3:0]. These pins are used for general-purpose I/O.
2
I C Controller
2
SCL
SDA
O
Serial Clock. This is the output clock for the I C. This pin is multiplexed with a
general-purpose I/O pin. When the general-purpose I/O pin is configured for
alternate function to enable the SCL function, this pin is open-drain.
2
I/O
Serial Data. This open-drain pin is used to transfer data between the I C and a
slave. This pin is multiplexed with a general-purpose I/O pin. When the general-
purpose I/O pin is configured for alternate function to enable the SDA function,
this pin is open-drain.
SPI Controller
I/O
Slave Select. This signal can be an output or an input. If the Z8 Encore! is the SPI
master, this pin may be configured as the Slave Select output. If the Z8 Encore! is
the SPI slave, this pin is the input slave select. It is multiplexed with a general-
purpose I/O pin.
SS
SCK
I/O
I/O
I/O
SPI Serial Clock. The SPI master supplies this pin. If the Z8 Encore! is the SPI
master, this pin is an output. If the Z8 Encore! is the SPI slave, this pin is an
input. It is multiplexed with a general-purpose I/O pin.
MOSI
MISO
Master Out Slave In. This signal is the data output from the SPI master device and
the data input to the SPI slave device. It is multiplexed with a general-purpose I/O
pin.
Master In Slave Out. This pin is the data input to the SPI master device and the
data output from the SPI slave device. It is multiplexed with a general-purpose I/O
pin.
PS017610-0404
Signal and Pin Descriptions
ZILOG [ ZILOG, INC. ]
