Renesas R61509V 用户手册

Rev. 0.11 April 25, 2008, page 104 of 181  

 

When transferring 16-bit instruction, it is divided into upper and lower 8 bits, and the upper 8 bits are 
transferred first (the LSB is not used).  The RAM write data is also divided into upper and lower 9 bits, and 
the upper 9 bits are transferred first.  The unused DB pins must be fixed at either IOVCC or IOGND level.  
When transferring the index register setting, make sure to write upper byte (8 bits). 

A1

HWR

RS

WR

:

9

9

IM[2:0] = 001

CSn



(RDX)

(RD

:)

D15-0

CS

:

DB17-9
DB8-0

 

 

DB

17

DB

16

DB

15

DB

14

DB

13

DB

12

DB

11

DB

10

DB

9

DB

17

DB

16

DB

15

DB

14

DB

13

DB

12

DB

11

DB

10

DB

9

IB

15

IB

IB

13

IB

12

IB

11

IB

10

IB

9

IB

8

IB

7

IB

6

IB

5

IB

4

IB

3

IB

2

IB

1

IB

0

14

Instruction write

Input

Instruction

First transfer

Second transfer

Instruction code

DB

17

DB

16

DB

15

DB

14

DB

13

DB

12

DB

11

DB

10

DB

9

DB

17

DB

16

DB

15

DB

14

DB

13

DB

12

DB

11

DB

10

DB

9

IB

15

IB

IB

13

IB

12

IB

11

IB

10

IB

9

IB

8

IB

7

IB

6

IB

5

IB

4

IB

3

IB

2

IB

1

IB

0

14

First transfer

Second transfer

Device code read / Instruction read

Instruction

Output

instruction code