TA1384FNG Datasheet, PDF (14/22 Pages) Toshiba Semiconductor – Mixer/Oscillator and PLL IC for TV/VCR Tuner

●Rsa, Rsb: Reference frequency divider ratio select bit.
Rsa
Rsb
DIVIDER RATIO
COMPARE
FREQUENCY
1
1
1/256
15.265kHz
0
1
1/512
7.8125kHz
X
1
1/320
12.5kHz
STEP FREQUENCY
62.5kHz
31.25kHz
50kHz
●OS: tuning amplifier control bit
[0] : tuning amplifier ON (normal operation)
[1] : tuning amplifier OFF (charge pump is sink mode)
●B4, B3, B2, B1: Band output port control and band change control bit
[0] : band output driver ON
[1] : band output driver OFF
Band
B4
B3
B2
B1
VHF Band
X
X
0
1
VHF Band
X
X
1
0
UHF Band
X
X
0
0
When the bandswitch data is [1] for either B1 or B2, VHF mode is effective.
When the bandswitch data is [0] for both B1 and B2, UHF mode is effective.
●POR: power-on reset flag
[0] : normal operation
[1] : reset operation
●FL: lock detect flag
[0] : unlocked
[1] : locked
●X : don’t care
TA1384FNG
-EXAMPLE OF BUS DATA TRANSMITTER-
S: Start
ADR: Address Byte
DIV1: Divider Byte 1 (frequency data)
DIV2: Divider Byte 2 (frequency data)
CONT: Control Byte
BAND: Bandswitch Byte
A: Acknowledge
P: Stop
[1] Transmitter - 1
S
ADR
A
DIV1
A
DIV2
A
CONT
A
BAND
A
P
[2] Transmitter - 2
S
ADR
A
CONT
A
BAND
A
DIV1
A
DIV2
A
P
[3] Transmitter – 3 (This can be applied if control data and bandswitch data have already been programmed.)
S
ADR
A
DIV1
A
DIV2
A
P
[4] Transmitter – 4 (This can be applied if frequency data have already been programmed.)
S
ADR
A
CONT
A
BAND
A
P
[5] Transmitter – 5 (This can be applied if frequency counter data and bandswitch data have already been programmed.)
S
ADR
A
CONT
A
P
Until the I²C-bus STOP condition is detected, it is possible to input the additional data without transmitting the address
data again. (For example: Frequency sweep is possible with additional frequency data.)
If data transmission is aborted, data programmed before the abort are valid.
14
2004/11/24