EM78P568

8-bit OTP Micro-controller

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* This specification are subject to be changed without notice.

36

01/31/2004

V4.7

Bit 1(ASW2) : Analog switch-2 control for multi-plexer in the CTCSS block

0

Select VRX2 output

1

Select VTX2 output

Bit 2(ASW3) : Analog switch-3 control for multi-plexer in the CTCSS block

0

Select VRX3 input

1

Select VTX3 input

Bit 3(ASW4) : Analog switch-4 control for multi-plexer in the CTCSS block

0

Select VRX4 output

1

Select VTX4 output

Bit 4(LPFPWR) : Power control for sub-audio LPF in the CTCSS block.

0/1

disable/enable

Bit 5(BPFPWR) : Power control for audio BPF in the CTCSS block.

0/1

disable/enable

Bit 6(RXPWR) : RX power control for the CTCSS block

0/1

disable/enable

Bit 7(TXPWR) : TX power control for the CTCSS block

0/1

disable/enable

Audio

BPF

VRF

VRF

Rx AMP

MIC AMP

Z C

AURX/P65

RXO

RXI

MICI

MICO

Summing

MTX/P66

VRF

-10dB

0dB

ASW1

ASW2

RXPWR

LPFPWR

BPFPWR

Sub-Audio

LPF

ASW4

MUX

PORT66

MTX

MUX

PORT65

AURX

P65S

P66S

AMP

MUX

ASW3

MUX

MUX

MUX

DETO

TXPWR

TXPWR

RXPWR

VRX1

VTX1

VRX2

VTX2

VRX3

VTX3

VRX4

VTX4

(from DAC output buffer B2)

CTCSS tone input

MUX

MICO

AMUTE

Name

Register bit location

ASW1

IOCE PAGE1 bit 0

ASW2

IOCE PAGE1 bit 1

ASW3

IOCE PAGE1 bit 2

ASW4

IOCE PAGE1 bit 3

LPFPWR

IOCE PAGE1 bit 4

BPFPWR

IOCE PAGE1 bit 5

RXPWR

IOCE PAGE1 bit 6

TXPWR

IOCE PAGE1 bit 7

Name

Register bit location

P65S

IOC6 PAGE1 bit 5

P66S

IOC6 PAGE1 bit 6

AMUTE

IOC6 PAGE1 bit 7

DETO

R7 PAGE1 bit 6

Fig.14 CTCSS block