199
Chapter 6
DMA Functions (DMA Controller)
User’s Manual U16580EE3V1UD00
(7)
DMA trigger factor registers 4 to 7 (DTFR4 to DTFR7)
The DTFRn register is an 8-bit register that controls the DMA transfer start trigger of DMA channel
n via interrupt requests from on-chip peripheral I/O (n = 4 to 7).
The interrupt request set by this register serves as DMA transfer start factor.
This register can be read or written in 8-bit units.
Reset input clears this register to 00H.
Cautions: 1. Do not set the same transfer start factor by different DTFRn registers.
2. Do not rewrite the DTFRn register until a started DMA transfer ends
(corresponding DTCRn register value is 00H).
3. Write the DTFRn register before setting the corresponding DTCRn register.
According to the present transfer start factor in the DTFRn register a DMA might
be started when the DTCRn register is written previously.
Figure 6-7:
DMA Trigger Factor Registers 4 to 7 (DTFR4 to DTFR7)
Note:
Not available on
μ
PD70F3447.
Remark:
n = 4 to 7
After reset:
00H
R/W
Address:
DTFR4 FFFFF348H, DTFR5 FFFFF34AH
DTFR6 FFFFF34CH, DTFR7 FFFFF34EH
7
6
5
4
3
2
1
0
DTFRn
0
0
0
0
0
IFCn2
IFCn1
IFCn0
IFCn2
IFCn1
IFCn0
DMA Transfer Start Factor
when n = 4, 5
when n = 6, 7
0
0
0
DMA request from on-chip peripheral I/O disabled
0
0
1
INTUC0R
INTUC0T
0
1
0
INTUC1R
INTUC1T
0
1
1
INTCB0R
INTCB0T
1
0
0
INTCB1R
Note
INTCB1T
Note
1
0
1
INTC30
INTC30
1
1
0
INTC31
Note
INTC31
Note
1
1
1
Setting prohibited
Содержание MuPD70F3187
Страница 6: ...6 Preface User s Manual U16580EE3V1UD00 ...
Страница 16: ...16 User s Manual U16580EE3V1UD00 ...
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Страница 32: ...32 User s Manual U16580EE3V1UD00 ...
Страница 84: ...84 Chapter 2 Pin Functions User s Manual U16580EE3V1UD00 MEMO ...
Страница 144: ...144 Chapter 3 CPU Functions User s Manual U16580EE3V1UD00 MEMO ...
Страница 192: ...192 Chapter 5 Memory Access Control Function μPD70F3187 only User s Manual U16580EE3V1UD00 MEMO ...
Страница 312: ...312 Chapter 9 16 Bit Timer Event Counter P User s Manual U16580EE3V1UD00 MEMO ...
Страница 534: ...534 Chapter 11 16 bit Timer Event Counter T User s Manual U16580EE3V1UD00 ...
Страница 969: ...969 Chapter 20 Port Functions User s Manual U16580EE3V1UD00 MEMO ...
Страница 970: ...970 Chapter 20 Port Functions User s Manual U16580EE3V1UD00 ...
Страница 976: ...976 Chapter 22 Internal RAM Parity Check Function User s Manual U16580EE3V1UD00 MEMO ...
Страница 984: ...984 Chapter 23 On Chip Debug Function OCD User s Manual U16580EE3V1UD00 MEMO ...
Страница 1006: ...1006 Chapter 24 Flash Memory User s Manual U16580EE3V1UD00 MEMO ...
Страница 1036: ...1036 Chapter 27 Recommended Soldering Conditions User s Manual U16580EE3V1UD00 MEMO ...
Страница 1046: ...1046 Appendix A Index User s Manual U16580EE3V1UD00 MEMO ...
Страница 1052: ...1052 User s Manual U16580EE3V1UD00 ...
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