User Guide

NSW-4
Disassembly & Troubleshooting
PAMS Technical Documentation
Page 49
Issue 1 Final Draft
08/00
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DescriptionNominal
level
Pin namePin no.
14 IF IN – Intermediate frequency input
15 N/C Not connected
16 TX ENA >2V TX enable
TDMA1900 PLL–circuit N870
Pin no. Pin name Nominal
level
Description
1 FAST 2.8V Enable input for fast chargepump
2 CPF – Fast charge pump output
3 CP – Normal charge pump output
4 VDD2 2.8V Power supply voltage
5 Vss3 0 Ground
6 RFI – Main divider input
7 Vss2 0 Ground
8 POL 2.8V polarity select
9 PON 2.8V Power on input
10 Vss1 0 Ground
11 CLK 2.8V Programming bus clock input
12 DATA 2.8V Programming bus data input
13 E 2.8V Programming bus enable input
14 Vdd1 2.8V Power supply voltage
15 XTALB – Complementary crystal frequency input
16 XTALA – Complementary crystal frequency input
17 GND(CP) 0 Ground for charge pump
18 Vcc 4.8V Supply voltage for charge pump
19 Iset – charge pump currents setting
20 LOCK – Out of lock detector