USER'S GUIDE

PARALLEL PROGRAM LOAD OPERATION

The DS5000 Parallel Program Load mode is compatible with the Program mode of the 87C51. The hardware configuration used for this mode of operation is shown in

Figure 16±3. Dallas Semiconductor recommends the use of the serial Program Load Mode over the Parallel Program Load Mode because of the ease of imple- mentation and simpler hardware interface.

PARALLEL PROGRAM LOAD CONFIGURATION Figure 16±3

 

 

VCC

GND

 

 

 

 

DS5000

 

 

PROGRAM

A7±A0

P1.7±

P0.7±

D7±D0

PROGRAM DATA IN/

ADDRESS

P1.0

P0.0

VERIFY DATA OUT

 

 

 

A11±A8

P2.3±

P3.7±

A15±A12 PROGRAM ADDRESS

 

P2.0

P3.4

 

 

 

EA/VPP

 

ALE/PROG

PROGRAM

 

CONTROL

P2.7

 

P2.6

P2.5

RST

XTAL1

PSEN

XTAL2

PARALLEL PROGRAM LOAD CYCLES Figure 16±4

P2.3±P2.0

 

 

P1.7±P1.0

ADDRESS

ADDRESS

PORT 0

DATA IN

DATA OUT

EA/VPP

VPP

VIH

ALE/PROG

P2.7

P2.6

PROGRAM CYCLE

VERIFY CYCLE

SECURITY SET

 

 

CYCLE

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Mitsubishi DS5000TK, DS907x SIP manual Parallel Program Load Operation, Parallel Program Load Configuration ±3, 141