WM8352 datasheet(150/336 Pages) WOLFSON

150 / 336 page

WM8352

Production Data

PD, February 2011, Rev 4.4

150

16.2.4

ON/OFF RAMP TIMING

The sink currents for ISINKA and ISINKB can be programmed to switch on and off gradually in LED

and in Flash modes. The current ramp durations are set as described in Table 99.

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R173 (ADh) for

ISINKA

R175 (AFh) for

ISINKB

5:4

CSn_OFF_RA

MP [1:0]

Switch-off ramp duration

LED Mode

Flash Mode

00 = instant (no

ramp)

01 = 0.25s

10 = 0.5s

11 = 1s

00 = instant (no

ramp)

01 = 1.95ms

10 = 3.91ms

11 = 7.8ms

1:0

CSn_ON_RAM

P [1:0]

Switch-on ramp duration

Similar to CSn_OFF_RAMP

Note: n is either ‘1’ for ISINKA or ‘2’ for ISINKB

Table 99 Configuring On/Off Ramp Timing for ISINKA and ISINKB

16.2.5

INTERRUPTS AND FAULT PROTECTION

The Current Sinks have a first-level interrupt, CS_INT (see Section 24). This comprises two second-

level interrupts which indicate if the Current Sinks are unable to sink the amount of current that has

been programmed. CS1_EINT and CS2_EINT can be masked by setting the applicable mask bit as

defined in Table 100.

ADDRESS

BIT

LABEL

DESCRIPTION

R26 (1Ah)

Interrupt Status

CS1_EINT

Flag to indicate drain voltage can no

longer be regulated and output current

may be out of spec.

(Rising Edge triggered)

Note: This bit is cleared once read.

CS2_EINT

Flag to indicate drain voltage can no

longer be regulated and output current

may be out of spec.

(Rising Edge triggered)

Note: This bit is cleared once read.

R34 (22h)

Interrupt Status

2 Mask

13:12

“IM_” + name of respective

bit in R26

Each bit in R34 enables or masks the

corresponding bit in R26. The default

value for these bits is 0 (unmasked).

Table 100 Current Sink Interrupts

WM8352 Datasheet(PDF) 150 Page - Wolfson Microelectronics plc

WM8352 Datasheet(HTML) 150 Page - Wolfson Microelectronics plc

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL