saa1575hl NXP Semiconductors, saa1575hl Datasheet - Page 10

• Manufacturer Part Number: saa1575hl
• Description: Global Positioning System Gps Baseband Processor
• Manufacturer: NXP Semiconductors

Philips Semiconductors
1999 Jun 04
RFLE
IF2
IF1
GPIO2
GPIO1
GPIO0
n.c.
RCLK
TEST1
TEST2
SYMBOL
Global Positioning System (GPS)
baseband processor
PIN
100
91
92
93
94
95
96
97
98
99
I/O
I/O
I/O
I/O
O
O
O
I
I
I
I
RFIC setup latch: output used to latch the RFIC set-up into the active UAA1570HL
control registers
MSB IF input: MSB of the 2-bit GPS digital IF signal input. Clocked in on the rising
edge of SCLK. If only a 1-bit IF input is available this input should be held HIGH.
LSB IF input: LSB of the 2-bit GPS digital IF signal input. Clocked in on the rising
edge of SCLK.
GPIO bit 2: standard general purpose I/O mapped into the segment 15 of the address
space. The top 4 bits can be used as the XA external timer control access pins
(T0, T1, T2 and T2EX).
GPIO bit 1: standard general purpose I/O mapped into the segment 15 of the address
space. The top 4 bits can be used as the XA external timer control access pins
(T0, T1, T2 and T2EX).
GPIO bit 0: standard general purpose I/O mapped into the segment 15 of the address
space. The top 4 bits can be used as the XA external timer control access pins
(T0, T1, T2 and T2EX).
Not connected: do not connect
Reference clock: input from the TXCO reference. Not used internally. This is divided
under firmware control to produce the sample clock, SCLK, used to gate the IF inputs.
Test pin: connect to pin 100
Test pin: connect to pin 99
10
DESCRIPTION
SAA1575HL
Product specification