PCI1221 datasheet(15/123 Pages) TI

15 / 123 page

PCI1221 GHK/PDV

PC CARD CONTROLLERS

SCPS042 – JULY 1998

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

Terminal Functions (Continued)

multifunction and miscellaneous pins

TERMINAL

I/O

NAME

PIN NUMBER

I/O

TYPE

FUNCTION

NAME

PDV

GHK

TYPE

MFUNC0

154

F15

I/O

Multifunction terminal 0. MFUNC0 can be configured as parallel PCI interrupt INTA, GPI0,

GPO0, socket activity LED output, ZV switching outputs, CardBus audio PWM, GPE, or a

parallel IRQ. Refer to the

multifunction routing register description on page 62 for

configuration details.

MFUNC1

155

E17

I/O

Multifunction terminal 1. MFUNC1 can be configured as parallel PCI interrupt INTB, GPI1,

GPO1, socket activity LED output, ZV switching outputs, CardBus audio PWM, GPE, or a

parallel IRQ. Refer to the

multifunction routing register description on page 62 for

configuration details.

Serial data (SDA). When the serial bus mode is implemented by pulling the LATCH terminal

low, the MFUNC1 terminal provides the SDA signaling. The two pin serial interface is used to

load the subsystem identification and other register defaults from an EEPROM after a PCI

reset. Refer to the

serial bus interface implementation description on page 29 for details on

other serial bus applications.

MFUNC2

157

A16

I/O

Multifunction terminal 2. MFUNC2 can be configured as GPI2, GPO2, socket activity LED

output, ZV switching outputs, CardBus audio PWM, GPE, or a parallel IRQ. Refer to the

multifunction routing register description on page 62 for configuration details.

MFUNC3

158

C15

I/O

Multifunction terminal 3. MFUNC3 can be configured as a parallel IRQ or the serialized

interrupt signal IRQSER. Refer to the

multifunction routing register description on page 62 for

configuration details.

MFUNC4

159

E14

I/O

Multifunction terminal 4. MFUNC4 can be configured as PCI LOCK, GPI3, GPO3, socket

activity LED output, ZV switching outputs, CardBus audio PWM, GPE, or a parallel IRQ. Refer

to the

multifunction routing register description on page 62 for configuration details.

Serial clock (SCL). When the serial bus mode is implemented by pulling the LATCH terminal

low, the MFUNC4 terminal provides the SCL signaling. The two pin serial interface is used to

load the subsystem identification and other register defaults from an EEPROM after a PCI

reset. Refer to the

serial bus interface implementation description on page 29 for details on

other serial bus applications.

MFUNC5

160

F13

I/O

Multifunction terminal 5. MFUNC5 can be configured as GPI4, GPO4, socket activity LED

output, ZV switching outputs, CardBus audio PWM, GPE, or a parallel IRQ. Refer to the

multifunction routing register description on page 62 for configuration details.

MFUNC6

161

B15

I/O

Multifunction terminal 6. MFUNC6 can be configured as a PCI CLKRUN or a parallel IRQ.

Refer to the

multifunction routing register description on page 62 for configuration details.

RI_OUT/PME

163

C14

Ring Indicate Out and Power Management Event Output. Terminal provides an output for

ring-indicate or PME signals.

SPKROUT

149

G15

Speaker output. SPKROUT is the output to the host system that can carry SPKR or CAUDIO

through the PCI1221 from the PC Card interface. SPKROUT is driven as the exclusive-OR

combination of card SPKR//CAUDIO inputs.

SUSPEND

156

D19

Suspend. SUSPEND is used to protect the internal registers from clearing when the PRST

signal is asserted. See

suspend mode description on page 40 for details.

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