USER'S GUIDE

RPC STATUS REGISTER ± STATUS (ADDRESS 0DAH) Figure 12±5

ST7

ST6

ST5

ST4

IAO

FO

IBF

OBF

Bit Description:

RPS.7±4:

General purpose status bits that can be written by the DS5001/2 and can be

 

read by the external host.

Initialization:

Cleared when RPCON=0.

Read Access:

Can be read by the DS5001/2 and host CPU when RPC mode is invoked.

Write Access:

Can be written by the DS5001/2 when RPC mode is invoked.

RPS.3:

IA0

 

Stores the value of the external system A0 for the last DBBIN Write when

 

a valid write occurs (as determined by the IBF flag).

Initialization:

Cleared when RPC=0.

Read Access:

Can be read by the DS5001/2 and host CPU when in RPC mode.

Write Access:

Automatically written when a valid DBBIN Write occurs. Cannot be written

 

otherwise.

RPS.2:

F0

 

General purpose flag written by the DS5001/2 and read by the external host.

Initialization:

Cleared when RPC=0.

Read Access:

Can be read by the DS5001/2 and host CPU when in RPC mode.

Write Access:

Can be written by the DS5001/2 when in RPC mode.

RPS.1:

IBF

 

Input Buffer Full Flag is set following a write by the external host, and is

 

cleared following a read of the DBBIN by the DS5001/2.

Initialization:

Cleared when RPC=0.

Read Access:

Can be read by the DS5001/2 and host CPU when in RPC mode.

Write Access:

Written automatically as part of the RPC communication. Cannot be set by

 

the application software.

RPS.0:

OBF

 

Output Buffer Full Flag is set following a write of the DBBOUT by the

 

DS5001/2, and is cleared following a read of the DBBOUT by the external

 

host.

Initialization:

Cleared when RPC=0.

Read Access:

Can be read by the DS5001/2 and host CPU when in RPC mode.

Write Access:

Written automatically as part of the RPC communication. Cannot be set by

 

the application software.

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Mitsubishi DS907x SIP, DS5000TK manual RPC Status Register ± Status Address 0DAH ±5, ST7 ST6 ST5 ST4 IAO IBF OBF