參數(shù)資料
型號(hào): KS88C9408
廠商: SAMSUNG SEMICONDUCTOR CO. LTD.
英文描述: 8-Bit CMOS Microcontroller(8位 CMOS 微控制器)
中文描述: 8位CMOS微控制器(8位的CMOS微控制器)
文件頁(yè)數(shù): 5/12頁(yè)
文件大?。?/td> 73K
代理商: KS88C9408
PRELIMINARY DATA SHEET
KS88C9408
5
POWER-ON
RESET
VDD
RST
RESET
Figure 3. Reset Logic
Power-Down Modes
Idle mode is invoked by the instruction, IDLE. In Idle
mode, the CPU "sleeps" while select peripherals
remain active. The internal clock signal is gated off to
the CPU, but is supplied to the interrupt structure,
basic timer, serial I/O block, or the random number
generator.
Stop mode is invoked by the instruction, STOP. In
Stop mode, the CPU and all peripheral functions "go
to sleep", and all on-chip operations come to a halt.
The Idle mode or Stop mode power-down condition
may be released in two ways:
— By an interrupt (After the interrupt is serviced, the
instruction immediately following the one that
initiated Idle mode is executed).
— By a reset operation (When RESET is released
and returns to High level, the CPU fetches the
instruction stored at memory location 0100H and
executes the application program).
Program Memory (ROM)
The KS88C9408 has a 16-Kbyte, read-only program
memory (ROM). The upper 15-Kbyte of the ROM is
reserved for a user application program. The lower
1-Kbyte is reserved for a built-in subroutine (kernel).
Data Memory (EEPROM)
The KS88C9408 has an 8-Kbyte electrically erasable
programmable read-only memory (EEPROM). The
EEPROM area is organized as a 32-byte page.
A single EEPROM load operation consists of an
erase and a write operation of from 1 to 32 bytes:
— In the erase operation, the selected data bytes
within the address range are set to logic one.
— In the write operation, individual bits within the
byte range are selectively changed from logic
one to logic zero.
A built-in subroutine supports programming in data
memory. The lower 32 bytes of the EEPROM
(8000H–801FH) is a read-only information area. You
can use this area to store manufacturing data about
the chip or the smart card.
Data Buffer (SRAM)
The KS88C9408 has a 256-byte area (in SRAM)
which serves as a buffer for serial data that is being
transmitted or received through the SIO pin.
FFFFH
FF00H
9FFFH
8000H
3FFFH
0400H
03FFH
000H
DATA BUFFER (256-BYTE)
NOT USED
DATA MEMORY (8-KB)
NOT USED
PROGRAM MEMORY
(15-KB)
BUILT-IN SOFTWARE
SUBROUTINE (1-KB)
Figure 4. Memory Map
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