EM78P157N Datasheet, PDF (11/56 Pages) ELAN Microelectronics Corp – 8-Bit Microcontroller with OTP ROM

EM78P157N
8-Bit Microcontroller with OTP ROM
4 Function Description
OSCO
OSCI /RESET
Oscillator/Timing
Control
WDT timer ^{TCC /INT}
Prescaler
IOCA
RAM
Interrupt
Controller
R4
R1(TCC)
ROM
Instruction
Register
Instruction
Decoder
R2
Stack
ALU
R3
ACC
DATA & CONTROL BUS
P60//INT
P61
IOC6
R6
I/O
PORT 6
P62
P63
IOC5 _I/O
P64
PORT 5
P65
R5
P50
P51
P52
P53
P66
P67
Fig. 4-1 Function Block Diagram
4.1 Operational Registers
The following is the operational registers’ data memory configuration.
Address
00
01
02
03
04
05
06
07
08
09
0A
0B
0C
0D
0E
0F
10
︰
3F
R PAGE Registers
R0
R1
R2
R3
R4
R5
R6
Reserve
Reserve
Reserve
Reserve
Reserve
Reserve
Reserve
Reserve
RF
(IAR)
(TCC)
(PC)
(Status)
(RSR)
(Port5)
(Port6)
(Interrupt Status)
General Registers
Reserve
CONT
Reserve
Reserve
Reserve
IOC5
IOC6
Reserve
Reserve
Reserve
IOCA
IOCB
IOCC
IOCD
IOCE
IOCF
IOC PAGE Registers
(Control Register)
(I/O Port Control Register)
(I/O Port Control Register)
(Prescaler Control Register)
(Pull-down Register)
(Open-drain Control)
(Pull-high Control Register)
(WDT Control Register)
(Interrupt Mask Register)
Product Specification (V1.0) 09.22.2005
•5
(This specification is subject to change without further notice)