TCM4400 Datasheet, PDF (13/72 Pages) Texas Instruments – GSM/DCS BASEBAND AND VOICE A/D AND D/A RF INTERFACE CIRCUIT

1.4 Terminal Functions (continued)
TERMINAL
I/O
NAME NO.
DESCRIPTION
DV_SS1
DV_SS2
DV_SS3
DV_SS4
EARN
79
Digital negative power supply (baseband and timing serial interfaces)
65
Digital negative power supply (baseband codec)
49
Digital negative power supply (auxiliary RF functions)
22
Digital negative power supply (voice band codec and serial interface)
33 O Earphone amplifier output (–) (analog)
EARP
32 O Earphone amplifier output (+) (analog)
GNDA1
25
Analog signal ground for the microphone amplifier and auxiliary input
GNDA2
35
Signal return (ground) for AUXO output
IBIAS
9 I/O Internal bias reference current adjust – adjust with external resistor (analog)
MCLK
70 I Master system clock input (13 MHz )
MICBIAS 26 I Microphone bias supply output – also used to decouple bias supply with external capacitor (analog)
MICIP
27 I Microphone amplifier input (+) (analog)
MICIN
28 I Microphone amplifier input (–) (analog)
PWRDN 23 I Power-down mode control input (digital) – active high
RESET
12 I Device global hardware reset (digital) – active low
SSCLK
20 O DAI external 104-kHz clock output (digital)
SSDR
19 I DAI data transfer input – connect to GSM-SS TDAI (digital/pullup)
SSDX
18 O DAI data transfer output – connect to GSM-SS RDAI (digital)
SSRST
17 I DAI reset input (digital/pullup)
TCK
64 I Scan test clock (digital/pulldown)
TDI
63 I Scan path input (for testing purposes) (digital/pullup)
TDO
62 I Scan path output (for testing purposes) (digital/3-state)
TEST1
69 I/O Test I/O (digital/3-state and pullup)
TEST2
68 I/O Test I/O (digital/3-state and pullup)
TEST3
67 O Test output (digital)
TMS
61 I JTAG test mode select (digital/pullup)
TRST
24 I JTAG serial interface and boundary-scan register reset (digital/pullup) – active low
UCLK
78 I Microcontroller unit (MCU) interface clock input (digital)
UDR
77 I MCU interface data transfer input (digital)
UDX
76 O MCU interface data transfer output (digital/3-state)
USEL
75 I MCU serial interface select (digital)
VCLK
16 O Voice band serial interface clock output (digital/3-state)
VDR
15 I Voice band serial interface receive data input (digital)
VDX
14 O Voice band serial interface transmit data output (digital/3-state)
VFS
13 O Voice band serial interface transmit frame synchronization output (digital/3-state)
VGAP
10 I/O Band gap reference voltage – decouple with external capacitor (analog)
VMID
50 O Baseband uplink midrail voltage output – serves as reference common-mode voltage for RF device
when directly dc coupled (analog)
V_REF
8 I/O Reference voltage – decouple with external capacitor (analog)
1–5