EM78P156EL Просмотр технического описания (PDF) - Elan Microelectronics Corp

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EM78P156EL

8-BIT MICRO-CONTROLLER

Elan Microelectronics Corp 

EM78P156EL

OTP ROM

• IOCF is the interrupt mask register.

• Note that the result of reading RF is the "logic AND" of RF and IOCF.

8. R10 ~ R3F

• All of these are 8-bit general-purpose registers.

4.2 Special Purpose Registers

1. A (Accumulator)

• Internal data transfer, or instruction operand holding

• It cannot be addressed.

2. CONT (Control Register)

7

6

5

4

3

2

-

/INT

TS

TE

PAB

PSR2

• Bit 0 (PSR0) ~ Bit 2 (PSR2) TCC/WDT prescaler bits.

PSR2

0

0

0

0

1

1

1

1

PSR1

0

0

1

1

0

0

1

1

PSR0

0

1

0

1

0

1

0

1

TCC Rate

1:2

1:4

1:8

1:16

1:32

1:64

1:128

1:256

WDT Rate

1:1

1:2

1:4

1:8

1:16

1:32

1:64

1:128

• Bit 3 (PAB) Prescaler assignment bit.

0: TCC

1: WDT

• Bit 4 (TE) TCC signal edge

0: increment if the transition from low to high takes place on TCC pin

1: increment if the transition from high to low takes place on TCC pin

• Bit 5 (TS) TCC signal source

0: internal instruction cycle clock

1: transition on TCC pin

• Bit 6 (/INT) Interrupt enable flag

0: masked by DISI or hardware interrupt

1: enabled by ENI/RETI instructions

• Bit 7 Not used.

• CONT register is both readable and writable.

1

PSR1

0

PSR0

This specification is subject to change without prior notice.

12

07.29.2004 (V1.3)

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