EM78P153EN EMC [ELAN Microelectronics Corp], EM78P153EN Datasheet - Page 6

• Manufacturer Part Number: EM78P153EN
• Description: EM78P153E is an 8-bit microprocessor with low-power and high-speed CMOS technology
• Manufacturer: EMC [ELAN Microelectronics Corp]

4. FUNCTION DESCRIPTION
This specification is subject to change without prior notice.
4.1 Operational Registers
Control
Oscillator/Timing
Built-in
OSC
OSCI
1. R0 (Indirect Addressing Register)
2. R1 (Time Clock /Counter)
OSCO
R0 is not a physically implemented register. Its major function is to be an indirect addressing pointer.
Any instruction using R0 as a pointer, actually accesses data pointed by the RAM Select Register
(R4).
• Increased by an external signal edge, which is defined by TE bit (CONT-4) through the TCC pin, or
• Writable and readable as any other registers.
• Defined by resetting PAB(CONT-3).
• The prescaler is assigned to TCC if the PAB bit (CONT-3) is reset.
• The contents of the prescaler counter is cleared only when a value is written to TCC register.
by the instruction cycle clock.
/RESET
RAM
R3
WDT timer
Prescaler
R1(TCC)
DATA & CONTROL BUS
R6
IOC6
Fig. 2 Function Block Diagram
Interrupt
Controller
TCC
I/O
PORT 6
/INT
6
Instruction
Decoder
Instruction
Register
ROM
P60
P61
P63/REST
P66
P67
P62/TCC
P64/OSCO
P65/OSCI
R2
EM78P153E
R3
ALU
Stack
OTP ROM
ACC
2002/03/01