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5.2

Pin description

Table 1

Pin description for the TFABGA48 package

SYMBOL

BALL

DESCRIPTION

I/O

SIGNAL TYPE

SOURCE

POR

A1

reset output to baseband controller

O

1

× CMOS output

BB

SHIFTCTRL

C2

test mode

I

non-inverting CMOS input with pull-down

test

VIO_POWER

B1

power-on reset reference

I

Schmitt-trigger input

C1

core supply voltage

P

core power

LPO_CLK

D1

3.2 kHz low-power clock to baseband controller

O

1

× CMOS output

BB

PX_ON

E1

receive packet synchronization correlation achieved

I

non-inverting CMOS input

BB

E2

I/O ground supply

P

I/O ground

SYS_CLK_REQ

F1

system clock control input from baseband controller

I

non-inverting CMOS input

BB

SYS_CLK

G1

controlled system clock output to baseband

controller

O3

× CMOS output

BB

TX_CLK

F2

transmit data clock output to baseband controller

O

1

× CMOS output

BB

G2

core ground supply

P

core ground

RX_DATA

H1

receive data output to baseband controller

O

1

× CMOS output

BB

ANATEST

G3

test mode

I

non-inverting CMOS input with pull-down

test

H2

oscillator ground supply

P

oscillator ground

XOUT

H3

oscillator output

O

oscillator output

misc

XIN

H4

oscillator input

I

oscillator input

misc

H5

oscillator supply voltage

P

oscillator power

G5

I/O supply voltage

P

I/O power

POR_EXT

H6

reset and POR on control input

I

non-inverting CMOS input

host

TEST_EN

H7

test mode

I

non-inverting CMOS input with pull-down

test

SLCCTR

G6

DC offset control to UAA3558

O

1

× CMOS output

G7

I/O ground supply

P

I/O ground

S_EN

H8

serial interface and timing control output to UAA3558

O

1

× CMOS output

UAA

S_CLK

F7

serial interface clock output to UAA3558

O

1

× CMOS output

UAA

S_DATA

G8

serial interface data output to UAA3558

O

1

× CMOS output

UAA

REF_CLK

F8

reference clock output to UAA3558

O

3

× CMOS output

UAA

E8, D8

analog ground supply

P

analog ground

RSSI

D7

RSSI analog input from UAA3558

I

analog input

UAA

T_GFSK

C8

analog transmit data output to UAA3558

O

analog output

UAA