RTD Embedded Technologies, Inc.
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50
DM34216HR
User’s Manual
BDM-610010056 Rev A
6.1
BAR2: PWM
This function block provides interface to the PWM function block. This function block features 4 PWM channels.
6.1.1
F
UNCTION
B
LOCK
R
EGISTER
M
AP
Table 17:PWM Functional Block
Offset
0x03
0x02
0x01
0x00
H
ea
de
r FB + 0x00
FB_ID
FB + 0x04
FB_DMA_BUFFERS
FB_DMA_CHANNELS FB_CONTROL_SIZE
FB_CHANNEL_SIZE
PWM
C
on
trol
FB + 0x08
STOP_TRIG
START_TRIG
CLK_SRC
MODE_STATUS
FB + 0x0C
CLK_DIV
FB + 0x10
CLK_DIV_CNTR
FB + 0x14
Reserved
FB + 0x18
Reserved
FB + 0x1C
PERIOD_COUNT
FB + 0x20
INT_ENA (Conversion, Start, Stop, Error, Channel)
FB + 0x24
INT_STAT
Reserved
FB + 0x28
CLK_BUS3
CLK_BUS2
Reserved
Reserved
FB + 0x2C
CLK_BUS7
CLK_BUS6
CLK_BUS5
CLK_BUS4
C
ha
nn
el n
FB + 0x08 +
(FB_CONTROL_SIZE * 0x04) +
(FB_CHANNEL_SIZE * 0x04 * n)
CHn_FIFO_DATA_CNT
FB + 0x0C +
(FB_CONTROL_SIZE * 0x04) +
(FB_CHANNEL_SIZE * 0x04 * n)
CHn_MAX_FIFO_SIZE
FB + 0x10 +
(FB_CONTROL_SIZE * 0x04) +
(FB_CHANNEL_SIZE * 0x04 * n)
CHn_PWM_WIDTH
FB + 0x14 +
(FB_CONTROL_SIZE * 0x04) +
(FB_CHANNEL_SIZE * 0x04 * n)
CHn_FIFO_ACCESS
Note: n in the offset stands for the channel number.
6.1.2
M
ODE
_S
TATUS
(R
EAD
/W
RITE
,
R
EAD
-O
NLY
)
Selects the current mode of operation and indicates its triggering status.
B[3:0]: Mode
o
0x04: Uninitialized. This is the power-on state. No converter initialization has taken place. Sampling is stopped, and all
counters are reset and the triggering state machine is reset. Transition to any of the other Modes will start converter
initialization (sampling will not start until initialization is complete).
o
0x00: Reset. Counting is stopped. All counters are reset and the triggering state machine is reset.
o
0x01: Paused. Counting is stopped, but the counters and triggering state machine maintain their state.
o
0x02: Go, Single-Shot. After filling the buffer with the Post-Stop samples, capturing stops. The Mode must be set back
to RESET in order to capture more samples.
o
0x03: Go, Re-arm. After filling the buffer with the Post-Stop samples and the FIFO is empty, the triggering state machine
is restarted, i.e. FIFO is filled with Pre-Start samples and waits for a start trigger.