ST72344S4 datasheet(73/247 Pages) STMICROELECTRONICS

tên linh kiện	ST72344S4

Giải thích chi tiết về linh kiện	SCI asynchronous serial interface

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ST72344xx, ST2345xx

Power-saving modes

Doc ID 12321 Rev 6

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9.7.2

AWUFH prescaler register (AWUPR)

Reset value: 1111 1111 (FFh)

Bits 7:0= AWUPR[7:0] Auto-wakeup Prescaler

These 8 bits define the AWUPR Dividing factor, as explained below:

In AWU mode, the period that the MCU stays in Halt mode (tAWU in Figure 33) is defined by

This prescaler register can be programmed to modify the time that the MCU stays in Halt

mode before waking up automatically.

AWUPR7

AWUPR6

AWUPR5

AWUPR4

AWUPR3

AWUPR2

AWUPR1

AWUPR0

Read/Write

Table 24.

AWUPR dividing factor

AWUPR[7:0]

Dividing factor

00h

Forbidden (1)

If 00h is written to AWUPR, depending on the product, an interrupt is generated immediately after a HALT

instruction, or the AWUPR remains unchanged.

01h

...

FEh

254

FFh

255

AWU

AWUPR

AWURC

--------------------------t

RCSTRT

Table 25.

AWU register map and reset values

Address

(Hex.)

label

765

432

002Eh

AWUCSR

Reset value

000

AWUF

AWUM

AWUEN

002Fh

AWUPR

Reset value

AWUPR7

AWUPR6

AWUPR5

AWUPR4

AWUPR3

AWUPR2

AWUPR1

AWUPR0

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