Texas Instruments SimpleLink CC2620 Technical Reference Manual page 1056

µDMA Registers
12.5.1.1 STATUS Register (Offset = 0h) [reset = 1F0000h]
STATUS is shown in
Status
31 30
23 22
RESERVED
R-0h
15 14
7 6
Bit Field
31-28 TEST
27-21 RESERVED
20-16 TOTALCHANNELS
15-8 RESERVED
7-4 STATE
3-1 RESERVED
1056
Micro Direct Memory Access (µDMA)
Figure 12-7 and described in
Figure 12-7. STATUS Register
29 28
TEST
R-0h
21 20
13 12
5 4
STATE
R-0h
Table 12-8. STATUS Register Field Descriptions
Type Reset
R 0h
R 0h
R 1Fh
R 0h
R 0h
R 0h
Copyright © 2015, Texas Instruments Incorporated
Table 12-8.
27
19
TOTALCHANNELS
R-1Fh
11
RESERVED
R-0h
3
RESERVED
R-0h
Description
0x0: Controller does not include the integration test logic
0x1: Controller includes the integration test logic
0x2: Undefined
...
0xF: Undefined
Software must not rely on the value of a reserved. Writing any other
value than the reset value may result in undefined behavior.
Register value returns number of available uDMA channels minus
one. For example a read out value of:
0x00: Show that the controller is configured to use 1 uDMA channel
0x01: Shows that the controller is configured to use 2 uDMA
channels
...
0x1F: Shows that the controller is configured to use 32 uDMA
channels (32-1=31=0x1F)
Software must not rely on the value of a reserved. Writing any other
value than the reset value may result in undefined behavior.
Current state of the control state machine. State can be one of the
following:
0x0: Idle
0x1: Reading channel controller data
0x2: Reading source data end pointer
0x3: Reading destination data end pointer
0x4: Reading source data
0x5: Writing destination data
0x6: Waiting for uDMA request to clear
0x7: Writing channel controller data
0x8: Stalled
0x9: Done
0xA: Peripheral scatter-gather transition
0xB: Undefined
...
0xF: Undefined.
Software must not rely on the value of a reserved. Writing any other
value than the reset value may result in undefined behavior.
SWCU117C – February 2015 – Revised September 2015
26 25
RESERVED
R-0h
18 17
10 9
2 1
MASTERENAB
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24
16
8
0
LE
R-0h