HC705CT4GRSSLASHD datasheet(77/152 Pages) NXP

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Synchronous Serial Interface (SSI)

SSI Power Supply Source

MC68HC705CT4 — Rev. 2.0

General Release Specification

MOTOROLA

Synchronous Serial Interface (SSI)

this occurrence, the programmer should ensure that all transfers are

complete before entering the stop mode.

If the SSI is configured to slave mode, further care should be taken in

entering stop mode. The SCK pin will still accept a clock from an external

master, allowing potentially unwanted transfers to take place and power

consumption to be increased. The SSI will not generate interrupt

requests in this situation but, on exiting stop mode through some other

means, the SF flag may be found to be set and an interrupt request will

be generated if SIE is also set at this point.

To avoid these potential problems, it is safer to disable the SSI

completely (SE = 0) before entering stop mode.

The synchronous serial interface (SSI) is a 2-wire master/slave system

including serial clock (SCK) and serial data input/output (SDIO). When

operating as a master device, the serial clock speed is selectable

between four rates.

9.7 SSI Power Supply Source

The power supplied to the SSI is VDD and VSS, thus keeping the VDD2

and VSS2 free for the noise susceptible modules.

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

HC705CT4GRS/D Fiches technique(PDF) 77 Page - NXP Semiconductors