IA186EM-PQF100I-R datasheet(47/133 Pages) INNOVASIC

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IA186EM/IA188EM

Data Sheet

8/16-BIT Microcontrollers

As of Production Version -03

This register controls the operation of the sden1 and sden0 outputs and the baud rate of the SSI port. The

sden1 and sden0 outputs are held high when the respective bit is set to 1, but in the event that both DE1

and DE0 are set to 1 then only sden0 will be held high.

The value of the SSR register is 0000h at reset.

Reserved

SCLKDIV

RES

DE1-DE0

Reserved (bits 15-6) – Reserved Bits.

SCLKDIV (bits 5-4) – SCLK Divide. These bits set the SCLK frequency. SCLK is the result of

dividing the internal processor clock by 2, 4, 8, or 16 as in the following table.

SCLKDIV

SCLK Frequency Divider

00b

Processor Clock /2

01b

Processor Clock /4

10b

Processor Clock /8

11b

Processor Clock /16

RES (bits 3-2) – Reserved Bits.

DE1 (bit1) - SDEN1. The SDEN1 bit is held high when this bit is set to 1 and SDEN1 is held low

when this bit is set to 0.

DE0 (bit0) – SDEN0. The SDEN0 bit is held high when this bit is set to 1 and SDEN0 is held low

when this bit is set to 0.

SSS (010h) – Synchronous Serial Status Register.

This is a read only register that indicates the state of the SSI port.

The value of the SSR register is 0000h at reset.

Reserved

RE/TE DR/DT PB

Reserved (bits 15-3) – Reserved Bits.

RE/TE (bit 2) – Receive/Transmit Error Detect. This bit is set to 1 when a read of the Synchronous

Serial Received register or a write to one of the transmit register is detected while the interface is busy

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