z16f2811 ZiLOG Semiconductor, z16f2811 Datasheet - Page 27
z16f2811
Manufacturer Part Number
z16f2811
Description
High Performance Microcontrollers
Manufacturer
ZiLOG Semiconductor
Datasheet
1.Z16F2811.pdf
(383 pages)
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Table 2. Signal Descriptions (Continued)
PS022006-0207
Signal Mnemonic
WR
CS0/CS1 / CS2
CS3/CS4/CS5
BHEN/BLEN
WAIT
Direct Memory Access Controller
DMA0REQ
DMA1REQ
DMA2REQ
DMA0ACK
DMA1ACK
DMA2ACK
Inter-Integrated Circuit Controller
SCL
SDA
Enhanced Serial Peripheral Interface Controller
SS
SCK
MOSI
I/O
I/O
I/O
I/O
I/O
I/O
O
O
O
O
I
I
Description
Write output: This pin is the Write output signal from the external
interface. Assertion of the WR signal indicates that the ZNEO CPU
is performing a Write operation to the external memory or
peripheral.
Chip select outputs: These pins are the chip select output signals
from
programmable polarity through the external interface control
register.
Byte high enable and byte low enable indicators.
Wait input: Asserting this input signal will pause the CPU to
provide slower external peripherals more time to complete bus
transactions through the external interface.
DMA request inputs: Each of the DMA channels have an external
request input which allows external peripherals to request access
to the address and data buses for data transfer.
DMA request outputs: Each of the DMA channels have an
acknowledge indicator output to notify external peripherals that
their request for access to address and data buses has been
approved.
Serial clock: This is an input or an output clock for the I
the GPIO pin is configured for alternate function to enable the SCL
function, this pin is open-drain.
Serial data: This open-drain pin transfers data between the I
and a slave. When the GPIO pin is configured for alternate
function to enable the SDA function, this pin is open-drain.
Slave select: This signal is an output or an input. If ZNEO is the
SPI master, this pin is configured as the slave select output. If
ZNEO is the SPI slave, this pin is an input slave select.
SPI serial clock: The SPI master supplies this pin. If the ZNEO
Z16F Series device is the SPI master, this pin is an output. If the
ZNEO Z16F Series
Master-Out/Slave-In: This signal is the data output from the SPI
master device and the data input to the SPI slave device.
P R E L I M I N A R Y
the
external
device
interface.
is the SPI slave, this pin is an input.
The CS output
Signal and Pin Descriptions
Product Specification
ZNEO
™
Z16F Series
pins
2
C. When
have
2
C
13
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