TA1375FG Datasheet, PDF (18/24 Pages) Toshiba Semiconductor – Single Conversion Tuner for Digital TV / CATV

TA1375FG
[[ BYTE 5 ]]
Byte 5 is used to set the test mode and control the output ports (VHF-L, VHF-H, UHF and FMT).
When an output port is set to [0], it is OFF; when it is set to [1], it is ON.
As setting the band switch data, It can be control change of VHF or UHF, band switch driver.
No.
Band SW Data (setting data)
Mixer
Oscillator
Band Drive Port
-
B4
B3
B2
B1 VHF UHF VL
VH
U
VL
VH
U
FMT
1
0
0
0
0
Ê·
Ê·
Ê·
Ê·
Ê·
Ê·
Ê·
Ê·
Ê·
2
0
0
0
1
˓
Ê·
˓
Ê·
Ê·
˓
Ê·
Ê·
Ê·
3
0
0
1
0
˓
Ê·
Ê·
˓
Ê·
Ê·
˓
Ê·
Ê·
4
0
1
0
0
Ê·
˓
Ê·
Ê·
˓
Ê·
Ê·
˓
Ê·
5
1
0
0
0
Ê·
˓
Ê·
Ê·
˓
Ê·
Ê·
˓
Ê·
6
0
1
0
1
˓
Ê·
˓
Ê·
Ê·
˓
Ê·
Ê·
˓
7
1
0
0
1
˓
Ê·
˓
Ê·
Ê·
˓
Ê·
Ê·
˓
˓: Operation
Ê·: Not operation
When It Is setting the band sw data excepts from No.1 to No.7, this Is not operating mixer, oscillator and band switch
driver.
Please give the following currents to band switch driver respectively as the maximum value. If the band switch driver
operates 2-port ‘ON’(when setting data Is No.6 and No.7) , total band driver curent Is below 25mA.
VHF-L band switch driver (pin14) output current; 20mA(maximum)
VHF-H band switch driver (pin15) output current; 20mA(maximum)
UHF band switch driver (pin21) output current; 15mA(maximum)
VHF-L and FMT band switch driver (pin13 and 14) output total current; 25mA(maximum)
B) Read Mode (Status Request)
When Read Mode is set, power-on reset operation status and phase comparator lock detector output status are output to
the master device.
Bit 1 (POR) indicates the power-on reset operation status. When the power supply of Vcc1 stops, this bit is set to [1]. The
conditions for reset to [0] are that voltage supplied to Vcc1 is 3V or higher, that transmission is requested in Read Mode,
and that the status is output. (When Vcc1 is turned on, bit1 is also set to [1].)
Bit 2 (FL) indicates the phase comparator lock status. When this is locked, [1] is output; when it is unlocked, [0] is output.
2005/05/23
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