ST6380 datasheet(48/82 Pages) STMICROELECTRONICS

48 / 82 page

48/82

ST6380, ST6381, ST6382, ST6383, ST6388, ST6389

4.7 DEDICATED LATCHES

Two latches are available which may generate in-

terrupts to the ST638x core. The IR latch is set ei-

ther by the falling or rising edge of the signal on pin

PC6(IRIN). If bit 1 (IRPOSEDGE) of the latches

gered on the rising edge of the signal at

PC6(IRIN). If bit 1 (IRPOSEDGE) is low, then the

latch will be triggered on the falling edge of the sig-

nal at PC6(IRIN). The IR latch can be reset by set-

ting bit 3 (RESIRLAT) of the latches register; the

bit is write only and a high should be written every

time the IR latch needs to be reset. If bit 2 (IRINT-

EN) of the latches register (E9h) is high, then the

output of the IR latch, IRINTN, may generate an in-

terrupt (#0). IRINTN is inverted with respect to the

state of the IR latch. If bit 2 (IRINTEN) is low, then

the output of the IR latch, IRINTN, is forced

high.The state of the IR latch may be read from bit

3 (IRLATCH) of register E4h; if the IR latch is set,

then bit 3 will be high. The PWR latch is set either

by the falling or rising edge of the signal on pin

PC4(PWRIN). If bit 4 (PWREDGE) of the latches

gered on the rising edge of the signal at

PC4(PWRIN). If bit 4 (PWREDGE) is low, then the

latch will be triggered on the falling edge of the sig-

nal at PC4(PWRIN). The PWR latch can be reset

by setting bit 6 (RESPWRLAT) of the latches reg-

ister; the bit is set only and a high should be written

every time the PWR latch needs to be reset. If bit 5

(PWRINTEN) of the latches register (E9h) is high,

then the output of the PWR latch, PWRINTN, may

generate an interrupt (#4). PWRINTN is inverted

with respect to the state of the PWR latch. If bit 5

(PWRINTEN) is low, then the output of the PWR

latch, PWRINTN, is forced high.

Dedicated Latches Control Register (DLCR)

Address: E9h - Write only

Reset Value: XXh

Caution:

This register contains at least one write

only bit. Single bit instructions (SET, RES, INC

and DEC) should not be used.

Bit 7. This bit is not used

RESPWRLAT. Resets the PWR latch; this bit is

write only.

PWRINTEN. This bit enables the PWRINT signal

(#4) from the latch to the ST638x core. Undefined

after reset.

PWREDGE. The bit determines the edge which

will cause the PWRIN latch to be set. If this bit is

high, than the PWRIN latch will be set on the rising

edge of the PWRIN signal. Undefined after reset.

RESIRLAT. Resets the IR latch; this bit is write on-

ly. Undefined after Reset.

IRINTEN. This bit enables the IRINTN signal (#0)

from the latch to the ST638x core. Undefined after

reset.

IRPOSEDGE. The bit determines the edge which

will cause the IR latch to be set. If this bit is high,

than the IR latch will be set on the rising edge of

the IR signal. Undefined after reset.

Bit 0. This bit is not used

RESP-

WRLAT

PWRINT-

PWRED

RESIR-

LAT

IRINT-

IR-

POSED

ST6380 数据表(PDF) 48 Page - STMicroelectronics

ST6380 数据表(HTML) 48 Page - STMicroelectronics

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

数据表下载