DSP56852VF120 View Datasheet(PDF) - Freescale Semiconductor
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Description
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DSP56852VF120 Datasheet PDF : 48 Pages
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Table 3-1. 56852 Signal and Package Information for the 81-pin MAPBGA (Continued)
Pin No.
E3
Signal Name
WR
B4
RXD
Type
Output
Input
Description
Bus Control–Write Enable (WR)— is asserted during external
memory write cycles. When WR is asserted low, pins D0–D15 become
outputs and the controller puts data on the bus. When WR is
deasserted high, the external data is latched inside the external device.
When WR is asserted, it qualifies the A0–A15 pins. WR can be
connected directly to the WE pin of a Static RAM.
SCI Receive Data (RXD)—This input receives byte-oriented serial data
and transfers it to the SCI receive shift register.
GPIOE0
Input/Output Port E GPIO (0)—A general purpose I/O pin.
D4
TXD
Output(Z) SCI Transmit Data (TXD)—This signal transmits data from the SCI
transmit data register.
GPIOE1
Input/Output Port E GPIO (1)—A general purpose I/O pin.
B2
GPIOC0
Input/Output Port C GPIO (0)—This pin is a General Purpose I/O (GPIO) pin when
the SSI is not in use.
STXD
Output
SSI Transmit Data (STXD)—This output pin transmits serial data from
the SSI Transmitter Shift Register.
A2
GPIOC1
Input/Output Port C GPIO (1)—This pin is a General Purpose I/O (GPIO) pin when
the SSI is not in use.
SRXD
Input
SSI Receive Data (SRXD)—This input pin receives serial data and
transfers the data to the SSI Receive Shift Register.
A3
SCLK
Input/Output SPI Serial Clock (SCLK)—In Master mode, this pin serves as an
output, clocking slaved listeners. In Slave mode, this pin serves as the
data clock input.
GPIOC2
Input/Output
Port C GPIO (2)—This pin is a General Purpose I/O (GPIO) pin that
can individually be programmed as input or output pin.
STCK
Input/Output
SSI Serial Transfer Clock (STCK)—This bidirectional pin provides the
serial bit rate clock for the transmit section of the SSI. The clock signal
can be continuous or gated.
B3
SS
Input
SPI Slave Select (SS)—In Master mode, this pin is used to arbitrate
multiple masters. In Slave mode, this pin is used to select the slave.
GPIOC3
Input/Output
Port C GPIO (3)—This pin is a General Purpose I/O (GPIO) pin that
can individually be programmed as input or output pin.
STFS
Input/Output
SSI Serial Transfer Frame Sync (STFS) —This bidirectional pin is
used to count the number of words in a frame while transmitting. A
programmable frame rate divider and a word length divider are used for
frame rate sync signal generation.
56852 Technical Data, Rev. 8
12
Freescale Semiconductor
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