st20-gp1 STMicroelectronics, st20-gp1 Datasheet - Page 111

• Manufacturer Part Number: st20-gp1
• Description: Gps Processor
• Manufacturer: STMicroelectronics

Memory
UART
Parallel IO
Byte wide parallel port
Application specific
Miscellaneous
ConnectToGND
Pin
MemAddr1-19
MemData0-15
MemWait
notMemOE0-3
notMemCE0-3
notMemWB0-1
BootSource0-1
Pin
TXD0-1
RXD0-1
Pin
PIO0-5
Pin
PlinkData0-7
PlinknotReq
PlinknotAck
PlinkOut
Pin
GPSIF
Pin
Table 20.9 ST20-GP1 byte wide parallel port pins
Table 20.10 ST20-GP1 application specific pins
Table 20.11 ST20-GP1 miscellaneous pins
Table 20.8 ST20-GP1 parallel IO pins
Table 20.6 ST20-GP1 memory pins
Table 20.7 ST20-GP1 UART pins
In/Out
In/Out
In/Out
In/Out
In/Out
In/Out
in/out
in/out
in/out
out
out
out
out
out
out
out
in
in
in
in
in
Function
Address bus
Data bus. Data0 is the least significant bit (LSB) and
Data15 is the most significant bit (MSB).
Memory cycle extender
Output enable strobes – one per bank
Chip enable strobes – one per bank
Used as write strobe, or MemAddr0 on 8-bit bus.
Boot from ROM or from link
Function
UART serial data output
UART serial data input
Function
PIO
Function
Bidirectional data bus
Data transfer request
Data transfer acknowledge
Controls external buffers. When high signals the PLink is
outputting.
Function
GPS IF input
Function
Must be connected to GND
ST20-GP1
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