CHAPTER 12 NBD FUNCTION (
µµµµ
PD70F3116)
631
User’s Manual U14492EJ3V0UD
(d) SIZ0, SIZ1: Access data size specification
SIZ1
SIZ0
Target Space Access
NBD Space Access
0
0
8-bit length
Note 1
8-bit length
0
1
16-bit length
Note 1
1
0
32-bit length
1
1
Setting prohibited
Note 2
Setting prohibited
Note 2
Notes 1.
Can be set only on a read.
If set on a write, RAM data will be destroyed.
2.
A write is invalid and read data is undefined in cases where “Setting prohibited” is
specified.
(3) Flag sense packet
NBD Bus Line
AD3_DBG
AD2_DBG
AD1_DBG
AD0_DBG
1st
0
0
0
RFLG
RFLG 0: Not Ready
1: Ready
(4) Data packet
The data packet data size is the data size specified by SIZ1 and SIZ0 in a command packet (8, 16, or 32
bits).
NBD Bus Line
AD3_DBG
AD2_DBG
AD1_DBG
AD0_DBG
1st
D3
D2
D1
D0
2nd
D7
D6
D5
D4
3rd
D11
D10
D9
D8
4th
D15
D14
D13
D12
5th
D19
D18
D17
D16
6th
D23
D22
D21
D20
7th
D27
D26
D25
D24
8th
D31
D30
D29
D28
Содержание V850E/IA1 mPD703116
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