EM78R808A Ver la hoja de datos (PDF) - ELAN Microelectronics

Número de pieza

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Fabricante

EM78R808A

8-BIT MICRO-CONTROLLER

ELAN Microelectronics 

EM78808

8-bit Micro-controller

EVENT

T

P

REMARK

WDT wake up from sleep mode

0

0

WDT time out (not sleep mode)

0

1

/RESET wake up from sleep

1

0

Power up

1

1

Low pulse on /RESET

x

X

x : don't care

Bit 5(IOCPAGE) : change IOC5 ~ IOCE to another page

Please refer to Fig.4 control register configuration for details.

0/1 page0 / page1

Bit 6(IOCP1S) : change IOC PAGE1 and PAGE2 to another option register

Please refer to Fig.4 control register configuration for details.

0/1 page1 /page2

Bit 6(IOCP1S)

Bit 5 (IOCPAGE)

X

0

0

1

1

1

Bit 7(PAGE) : change R4 ~ RE to another page

Please refer to Fig.4 control register configuration for details.

0/1 page0 / page1

PAGE SELECT

PAGE 0

PAGE 1

PAGE 2

R4 (RAM selection for common registers R20 ~ R3F, SPI)

PAGE0 (RAM selection register)

7

6

5

4

3

2

1

0

RB1

RB0

RSR5

RSR4

RSR3

RSR2

RSR1

RSR0

Bit 0 ~ Bit 5 (RSR0 ~ RSR5) : Indirect addressing for common registers R20 ~ R3F

RSR bits are used to select up to 32 registers (R20 to R3F) in the indirect addressing mode.

Bit 6 ~ Bit 7 (RB0 ~ RB1) : Bank selection bits for common registers R20 ~ R3F

These selection bits are used to determine which bank is activated among the 4 banks for 32 register (R20 to

R3F)..

Please refer to Fig.4 control register configuration for details.

PAGE1 (SPI control register)

7

6

5

RBF

SPIE

SRO

4

3

2

1

0

SE

SCES

SBR2

SBR1

SBR0

Fig. 6 shows how SPI to communicate with other device by SPI module. If SPI is a master controller, it

sends clock through the SCK pin. An 8-bit data is transmitted and received at the same time. If SPI, however, is

defined as a slave, its SCK pin could be programmed as an input pin. Data will continue to be shifted on a basis

of both the clock rate and the selected edge.

______________________________________________________________________________________________________________________________________________________

* This specification is subject to change without notice.

8/1/2004 (V3.1)

14

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