Edma Module And Edma Selector - Texas Instruments TMS320C6712D User Manual

TMS320C6712D
FLOATING POINT DIGITAL SIGNAL PROCESSOR
SPRS293A − OCTOBER 2005 − REVISED NOVEMBER 2005

EDMA module and EDMA selector

The C67x EDMA for this device also supports up to 16 EDMA channels. Four of the sixteen channels (channels
8−11) are reserved for EDMA chaining, leaving 12 EDMA channels available to service peripheral devices. On
this device, the user, through the EDMA selector registers, can control the EDMA channels servicing peripheral
devices.
The EDMA selector registers are located at addresses 0x01A0FF00 (ESEL0), 0x01A0FF04 (ESEL1), and
0x01A0FF0C (ESEL3). These EDMA selector registers control the mapping of the EDMA events to the EDMA
channels. Each EDMA event has an assigned EDMA selector code (see Table 22). By loading each EVTSELx
register field with an EDMA selector code, users can map any desired EDMA event to any specified EDMA
channel. Table 21 lists the default EDMA selector value for each EDMA channel.
See Table 21 and Table 22 for the EDMA Event Selector registers and their associated bit descriptions.
Table 21. EDMA Channels
EDMA
EDMA SELECTOR
CHANNEL
CONTROL
REGISTER
0 ESEL0[5:0]
1 ESEL0[13:8]
2 ESEL0[21:16]
3 ESEL0[29:24]
4 ESEL1[5:0]
5 ESEL1[13:8]
6 ESEL1[21:16]
7 ESEL1[29:24]
−
8
−
9
−
10
−
11
12 ESEL3[5:0]
13 ESEL3[13:8]
14 ESEL3[21:16]
15 ESEL3[29:24]
† The GPINT[4−7] interrupt events are sourced from the GPIO module via the external interrupt capable GP[4−7] pins.
44
DEFAULT
DEFAULT
SELECTOR
EDMA
VALUE
EVENT
(BINARY)
−
000000
000001 TINT0
000010 TINT1
000011 SDINT
†
000100 GPINT4
†
000101 GPINT5
†
000110 GPINT6
†
000111 GPINT7
−
TCC8 (Chaining)
−
TCC9 (Chaining)
−
TCC10 (Chaining)
−
TCC11 (Chaining)
001000 XEVT0
001001 REVT0
001010 XEVT1
001011 REVT1
•
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Table 22. EDMA Selector
EDMA
EDMA
SELECTOR
EVENT
CODE (BINARY)
000000 Reserved
000001 TINT0
000010 TINT1
000011 SDINT
†
000100 GPINT4
†
000101 GPINT5
†
000110 GPINT6
†
000111 GPINT7
001000 Reserved
001001 Reserved
001010 GPINT2
001011 Reserved
001100 XEVT0
001101 REVT0
001110 XEVT1
001111 REVT1
010000−111111 Reserved
MODULE
TIMER0
TIMER1
EMIF
GPIO
GPIO
GPIO
GPIO
GPIO
McBSP0
McBSP0
McBSP1
McBSP1