34708 datasheet(112/159 Pages) FREESCALE

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Analog Integrated Circuit Device Data



Freescale Semiconductor

112

MC34708

Functional Block Description

7.9.3

SPI/I2C Specification

7.10

Configuration Registers

7.10.1 Register Set structure

The general structure of the register set is given in the following table. Expanded bit descriptions are included in the following

functional sections for application guidance. For brevity’s sake, references are occasionally made herein to the register set as

the “SPI map” or “SPI bits”, but note that bit access is also possible through the I2C interface option so such references are

implied as generically applicable to the register set accessible by either interface.

Table 100. SPI/I2C Electrical Characteristics

Characteristics noted under conditions BP = 3.6 V, VBUS = 5.0 V, -40 C  TA  85 C, unless otherwise noted. Typical values

at BP = 3.6 V and TA = 25 °C under nominal conditions, unless otherwise noted.

Symbol

Characteristic

Min

Typ

Max

Unit

Notes

SPI Interface Logic IO

VINCSLO

Input Low CS

0.0

0.4

VINCSHI

Input High CS

1.1

SPIVCC+0.3

VINMOSILO/

VINCLKLO

Input Low, MOSI, CLK

0.0

0.3*SPIVCC

VINMOSIHI/

VINCLKHI

Input High, MOSI, CLK

0.7*SPIVCC

SPIVCC+0.3

VMISOLO/

VINTLO

Output Low MISO, INT

• Output sink 100

A

0.0

0.2

VMISOHI/

VINTHI

Output High MISO, INT

• Output source 100

A

SPIVCC-0.2

SPIVCC

VCC-SPI

SPIVCC Operating Range

1.75

3.6

tMISOET

MISO Rise and Fall Time, CL = 50 pF, SPIVCC = 1.8 V

•SPIDRV [1:0] = 00

•SPIDRV [1:0] = 01 (default)

•SPIDRV [1:0] = 10

•SPIDRV [1:0] = 11

6.0

2.5

3.0

2.0

Table 101. Register Set

Interrupt Status 0

Memory A

Regulator Mode 0

ADC5

Interrupt Mask 0

Memory B

GPIOLV0 Control

ADC6

Interrupt Sense 0

Memory C

GPIOLV1 Control

ADC7

Interrupt Status 1

Memory C

GPIOLV2 Control

Input Monitoring

Interrupt Mask 1

RTC Time

GPIOLV3 Control

Supply Debounce

Interrupt Sense 1

RTC Alarm

USB Timing

VBUS monitoring

Power Up Mode Sense

RTC Day

USB Button

LED Control

Identification

RTC Day Alarm

USB Control

PWM Control

Regulator Fault Sense

Regulator 1 A/B Voltage

USB Device Type

Unused

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