UPD705100GJ-100-8 NEC [NEC], UPD705100GJ-100-8 Datasheet - Page 13

• Manufacturer Part Number: UPD705100GJ-100-8
• Description: V830TM 32-BIT MICROCONTROLLER
• Manufacturer: NEC [NEC]

3. 32-BIT BUS MODE
this mode, BE2/BH acts as BE2 and BE3/A1 acts as BE3.
3.1 Relationship between External Accesses and Byte Enable Signals
Byte
Halfword
Word
Burst transfer
If the SIZ16B input, sampled at reset, is inactive, the external bus width becomes 32 bits (32-bit bus mode). In
In 32-bit bus mode, BE0-BE3 are output. External accesses are related to byte enable signals as indicated below.
Data length
Bit 1
Operand address
0
0
1
1
0
1
0
0
0
0
0
Bit 0
0
1
0
1
0
0
0
0
0
0
0
Table 3-1. 32-Bit Bus Mode
BE3
1
1
1
0
1
0
0
0
0
0
0
BE2
1
1
0
1
1
0
0
0
0
0
0
Byte enable
BE1
1
0
1
1
0
1
0
0
0
0
0
BE0
0
1
1
1
0
1
0
0
0
0
0
PD705100
Ta,Tb1
Ta,Ts
Ta,Ts
Ta,Ts
Ta,Ts
Ta,Ts
Ta,Ts
Ta,Ts
State
Tb2
Tb3
Tb4
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