UPD70433GD-16-5BB NEC [NEC], UPD70433GD-16-5BB Datasheet - Page 49

• Manufacturer Part Number: UPD70433GD-16-5BB
• Description: V55PITM 16-BIT MICROPROCESSOR
• Manufacturer: NEC [NEC]

*
*
Single
transfer
mode
Demand
release
mode
Single
step
mode
Burst
mode
Intelligent DMA mode–1
(ring buffer method)
Intelligent DMA mode–2
(counter control method)
Next address specification mode
2–channel
operating mode
Memory–memory
transfer mode
Transfer
The DMA start source is an on-chip timer interrupt, and transfer is possible only when the transfer I/O specification is
external.
Transfer modes
<1> Single transfer mode
<2> Demand release mode
<3> Single step mode
<4> Burst mode
Mode
Operating Mode
Not Available
Peripheral
Available*
Available*
On–Chip
Available
Table 6-2. Correspondence Between Operating Modes and Transfer Modes
(Stop at end)
(Repetition)
(Stop at end)
(Repetition)
DMA Start Source
Not Available
Available
Available
Software
Available
Trigger
I/O (SFR)
Memory
Memory
I/O (SFR)
Memory
I/O
I/O
Transfer Type
Table 6-1. Transfer Modes
Memory
Memory
I/O (SFR)
DMARQ Pin
Memory
Memory
Memory
Available
Available
Available
Available
Memory
Stops when the DMARQ pin is
driven low during the transfer.
Reset of EDMA bit of DMAMn
register
None (stop disabled during the
transfer)
Reset of EDMA bit of DMAMn
register
Reset of EDMA bit of DMAMn
<1>
Yes
Yes
Yes
Yes
Yes
Yes
No
STOP Method
Possible Transfer Modes*
<2>
Yes
Yes
Yes
Yes
No
No
No
<3>
Yes
Yes
Yes
Yes
Yes
No
No
Not acknowledged
during transfer.
Acknowledged at
other times.
Acknowledged
Acknowledged
register
Not acknowledged
Interrupt
PD70433
<4>
Yes
Yes
Yes
No
No
No
No
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