8

SP5730

Preliminary Information

MSB

LSB

Address

1

1

0

0

0

MA1

MA0

1

A

Byte 1

Status byte

POR

FL

0

0

0

0

0

0

A

Byte 2

Table 2 Read data format (MSB is transmitted first)

A

:

Acknowledge bit

MA1,MA0

:

Variable address bits (see Table 3)

2

14

- 2

0

:

Programmable division ratio control bits

R4-R0

:

Reference division ratio select (see Figure 3)

C1, C0

:

Charge pump current select (see Figure 6)

RE

:

REF/COMP output enable

RS

:

REF/COMP output select when RE=1 (see Figure 2)

T1-T0

:

Test mode control bits

P3-P0

:

P3 - P0 port output states

POR

:

Power on reset indicator

FL

:

Phase lock flag

MA1

MA0

Address input voltage level

0

0

0 - 0.1Vcc

0

1

Open circuit

1

0

0.4Vcc - 0.6Vcc #

1

1

0.9Vcc - Vcc

# Programmed by connecting a 30k

Ω ± 5% resistor between pin 10 and Vcc

Table 3 Address selection

RE.RS

T1

T0

Test mode description

0

0

0

Normal operation

1

0

0

Normal operation Port P0 = Fpd/2

X

0

1

Charge pump sink.* Status byte FL set to logic ‘0’

X

1

0

Charge pump source * Status byte FL set to logic ‘0’

X

1

1

Charge pump disabled * Status byte FL set to logic ‘1’

*clocks need to be present on crystal and RF inputs to enable charge pump test modes and to toggle

Status byte bit FL

X = Dont Care

Table 4 Test modes