• INT_MOVE

0: Data is only output when error correction has completed, layer 2 CRC has completed, and the data was received with

the circuit synchronized. (default)

1: All data is output. (Operation is identical to that of the LC72700E.)

In the default state, this IC only outputs data that has been fully error corrected and that was received in both block

and frame synchronization. (This also includes the layer 2 CRC check.)

To acquire all data as provided by the LC72700, applications must set both this flag and the VEC_OUT (BIT2) flag

in control register 2 as described below.

• DO_MOVE (Valid only when SP is high.)

0: The high state (high impedance) is held at all times other than when data is being output. (default)

1: Operate identically to the LC72700 when changes are linked to the INT signal, i.e. when both INT_MOVE and

VEC_OUT are set to 1.

• CRC4_RST

0: (default)

1:Reset the layer 4 CRC detection circuit.

This flag is not automatically reset to 0. Applications must send a 0 value after setting this flag.

No. 6166-13/33

LC72710W, 72710LW

• DMA (Valid only when SP is low.)

0: Do not use DMA transfer for readout of post-error correction data. (default)

1: Use DMA transfer for readout of post-error correction data.

• DMA_RD (Valid only when SP is low.)

0: Use the RD signal as the DMA transfer read control signal. (default)

1: Use the DACK signal as the DMA transfer read control signal.

• VEC_OUT

0: Do not perform post-horizontal correction output when vertical correction processing is not performed. (default)

1: Output all data, even when vertical correction processing is not performed. (Operation identical to that of the

LC72700)

When this flag is set and a frame of data with absolutely no errors is received, data that is completely identical to the

corresponding post-horizontal correction data is output with the timing of the output of post-vertical correction data,

even if vertical correction is not performed.

This flag must be set to create interface specifications identical to those of the LC72700.

• RDY (Valid only when SP is low.)

0: The RDY output is issued with timing 1. (default)

1: The RDY output is issued with timing 2.

• DREQ (Valid only when SP is low.)

0: Negative logic is used for the polarity of the DREQ signal. (default)

1: Positive logic is used for the polarity of the DREQ signal.

• DACK (Valid only when SP is low.)

0: Negative logic is used for the polarity of the DACK signal. (default)

1: Positive logic is used for the polarity of the DACK signal.

• BLK_RST

0: (default)

1: Resets the block synchronization circuit only.

Sets the block synchronization status to unsynchronized and clears the block synchronization protection counter.

However, note that this has no effect on the frame synchronization functions. Also note that during a

synchronization block reset, the INT signal is not output and the DO pin outputs a high level (high-impedance).

This flag is not automatically reset to 0. Applications must send a 0 value after setting this flag.

• SUBBLK

0: Normal status. (default)

1: Set to 1 when a substation (for example a dGPS station during VICS reception) is temporarily received.

The SUBBLK and BLK_RST flags are mainly used when receiving and processing VICS data and dGPS data at the

same time. (See page 29.)

Control Register 2

Address

Register

R/W

Initial value

BIT7

BIT6

BIT5

BIT4

BIT3

BIT2

BIT1

BIT0

05H

CTL2

W

00H

SUBBLK

BLK_RST

DACK

DREQ

RDY

VEC_OUT

DMA_RD

DMA