ST10R172LT6 datasheet(26/68 Pages) STMICROELECTRONICS

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ST10R172L - POWER REDUCTION MODES

POWER REDUCTION MODES

Two different power reduction modes with different levels of power reduction can be entered

under software control.

In Idle mode the CPU is stopped, while the peripherals continue their operation. Idle mode

can be terminated by any reset or interrupt request.

In Power Down mode both the CPU and the peripherals are stopped. Power Down mode can

now be configured by software in order to be terminated only by a hardware reset or by an

external interrupt source on fast external interrupt pins.

All external bus actions are completed before Idle or Power Down mode is entered. However,

Idle or Power Down mode is not entered if READY is enabled, but has not been activated

(driven low for negative polarity, or driven high for positive polarity) during the last bus access.

SPECIAL FUNCTION REGISTERS

The following table lists all ST10R172L SFRs in alphabetical order.

Bit-addressable SFRs are marked with the letter “b” in column “Name”. SFRs within the

Extended SFR-Space (ESFRs) are marked with the letter “E” in column “Physical Address”.

An SFR can be specified by its individual mnemonic name. Depending on the selected

addressing mode, an SFR can be accessed by its physical address (using the Data Page

Pointers), or by its short 8-bit address (without using the Data Page Pointers).

Name

Physical

Address

8-Bit

Address

Description

Reset

Value

ADDRSEL1

FE18h

0Ch

Address Select Register 1

0000h

ADDRSEL2

FE1Ah

0Dh

Address Select Register 2

0000h

ADDRSEL3

FE1Ch

0Eh

Address Select Register 3

0000h

ADDRSEL4

FE1Eh

0Fh

Address Select Register 4

0000h

BUSCON0

FF0Ch

86h

Bus Configuration Register 0

0XX0h

BUSCON1

FF14h

8Ah

Bus Configuration Register 1

0000h

BUSCON2

FF16h

8Bh

Bus Configuration Register 2

0000h

BUSCON3

FF18h

8Ch

Bus Configuration Register 3

0000h

BUSCON4

FF1Ah

8Dh

Bus Configuration Register 4

0000h

CAPREL

FE4Ah

25h

GPT2 Capture/Reload Register

0000h

CC8IC

FF88h

C4h

EX0IN Interrupt Control Register

0000h

Table 10 Special functional registers

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