dsp56854 Freescale Semiconductor, Inc, dsp56854 Datasheet - Page 13

• Manufacturer Part Number: dsp56854
• Description: 16-bit Digital Signal Controllers
• Manufacturer: Freescale Semiconductor, Inc

Freescale Semiconductor
Pin No.
Table 3-1. 56854 Signal and Package Information for the 128-pin LQFP (Continued)
107
108
109
110
111
122
123
126
127
128
73
86
87
88
89
90
75
76
7
8
Signal Name
GPIOA0
GPIOA1
CS0
CS1
D10
D11
D12
D13
D14
D15
WR
RD
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
Input/Output(Z)
Input/Output
Input/Output
Output
Output
Output
Output
Type
56854 Technical Data, Rev. 6
Data Bus (D0-D15)—These pins provide the bidirectional data for
external program or data memory accesses.
Read Enable (RD) —is asserted during external memory read
cycles.
This signal is pulled high during reset.
Write Enable (WR)— is asserted during external memory write
cycles.
This signal is pulled high during reset.
External Chip Select (CS0)—This pin is used as a dedicated GPIO.
Port A GPIO (0) —This pin is a General Purpose I/O (GPIO) pin
when not configured for host port usage.
External Chip Select (CS1)—This pin is used as a dedicated GPIO.
Port A GPIO (1) —This pin is a General Purpose I/O (GPIO) pin
when not configured for host port usage.
Description
Introduction
13