System Control Module

9.5.6Pin Operation in Sleep Mode

The SA-1100 pins are categorized by the following types based on their behavior during sleep mode:

Type 1 – These pins are outputs and are driven low during sleep. These pins hold their state after sleep mode is exited until the DRAM_control_hold bit in the PSSR is cleared.

Type 2 – These pins are outputs and are normally driven to a one in sleep. To support systems that power down external devices, these pins can also be tristated in sleep through the use of the FLOAT_STATIC and FLOAT_PCMCIA bits in the PCFR. See the Section 9.5, “Power Manager” on page 9-26.

Type 3 – These pins are I/Os. When programmed as outputs, they can be actively held high or low during sleep. When programmed as inputs, they are actively sampled by the SA-1100.

Type 4 – These pins are I/Os but become inputs during sleep. They can be programmed to hold the pin state at a zero or can be tristated. The receivers on these pins are disabled during sleep. These pins hold their state after sleep mode is exited until the peripheral_control_hold bit in the PSSR is cleared.

Type 5 – These pins are outputs and are actively driven during sleep.

Type 6 – These pins are outputs and are tristated during sleep.

Type 7 – These pins are inputs and are actively sampled during sleep.

Type 8 – These pins are inputs and are not observed during sleep; the receiver is disabled.

Type 9 – These pins are analog inputs and outputs, and are always active.

Table 9-3.

Pin State During Step

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Pin Name

Type

 

Pin Name

Type

Pin Name

Type

Pin Name

Type

 

 

 

 

 

 

 

 

 

 

 

A<25:0>

1

 

nPREG

1

RXD_2

4

nRESET_OUT

1

 

 

 

 

 

 

 

 

 

 

 

D<31:0>

1

 

L_DD<7:0>

4

TXD_3

4

nTRST

8

 

 

 

 

 

 

 

 

 

 

 

nCS<3:0>

2

 

L_FCLK

4

RXD_3

4

TDI

8

 

 

 

 

 

 

 

 

 

 

 

nOE

2

 

L_BIAS

4

GP<27:0>

3

TDO

6

 

 

 

 

 

 

 

 

 

 

 

nWE

2

 

TXD_C

4

ROM_SEL

8

TMS

8

 

 

 

 

 

 

 

 

 

 

 

nRAS<3:0>

1

 

RXD_C

4

PXTAL

9

TCK

8

 

 

 

 

 

 

 

 

 

 

 

nCAS<3:0>

1

 

SCLK_C

4

PEXTAL

9

TCK_BYP

7

 

 

 

 

 

 

 

 

 

 

 

nPIOW

2

 

SFRM_C

4

TXTAL

9

TESTCLK

7

 

 

 

 

 

 

 

 

 

 

 

nPIOR

2

 

UDC+

4

TEXTAL

9

VDD

 

 

 

 

 

 

 

 

 

 

 

nPCE<2:1>

2

 

UDC-

4

PWR_EN

5

VDDX

 

 

 

 

 

 

 

 

 

 

 

nIOIS16

2

 

TXD_1

4

BATT_FAULT

7

VSS

 

 

 

 

 

 

 

 

 

 

 

nPWAIT

2

 

RXD_1

4

VDD_FAULT

7

VSSX

 

 

 

 

 

 

 

 

 

 

 

PSKTSEL

1

 

TXD_2

4

nRESET

7

 

 

 

 

 

 

 

 

 

 

9-32

SA-1100 Developer’s Manual

Page 102
Image 102
Intel SA-1100 manual Pin Operation in Sleep Mode, Pin State During Step, Pin Name Type