參數(shù)資料
型號: Z86E0812PSC1860
廠商: ZILOG INC
元件分類: 微控制器/微處理器
英文描述: CMOS Z8 OTP Microcontrollers
中文描述: 8-BIT, OTPROM, 12 MHz, MICROCONTROLLER, PDIP18
封裝: PLASTIC, DIP-18
文件頁數(shù): 25/44頁
文件大?。?/td> 251K
代理商: Z86E0812PSC1860
Z86E04/E08
Zilog
CMOS Z8 OTP Microcontrollers
DS97Z8X0401
P R E L I M I N A R Y
25
1
Program Memory.
The Z86E04/E08 addresses up to
1K/2KB of Internal Program Memory (Figure 11). The first
12 bytes of program memory are reserved for the interrupt
vectors. These locations contain six 16-bit vectors that cor-
respond to the six available interrupts. Bytes 0-1024/2048
are on-chip one-time programmable ROM.
Register File
. The Register File consists of three I/O port
registers, 124 general-purpose registers, and 14 control
and status registers R0-R3, R4-R127 and R241-R255, re-
spectively (Figure 12). General-purpose registers occupy
the 04H to 7FH address space. I/O ports are mapped as
per the existing CMOS Z8.
Figure 11. Program Memory Map
12
11
10
9
8
7
6
5
4
3
2
1
0
On-Chip
ROM
Location of
First Byte of
Instruction
Executed
After RESET
Interrupt
Vector
(Lower Byte)
Interrupt
Vector
(Upper Byte)
IRQ5
IRQ4
IRQ4
IRQ3
IRQ3
IRQ2
IRQ2
IRQ1
IRQ1
IRQ0
IRQ0
IRQ5
1023/2047
0CH
0BH
0AH
09H
08H
07H
06H
05H
04H
03H
02H
01H
00H
3FH/7FFH
Figure 12. Register File
SPL
Stack Pointer (Bits 7-0)
General-Purpose Register
Register Pointer
Program Control Flags
Interrupt Mask Register
Interrupt Request Register
Interrupt Priority Register
Ports 0-1 Mode
Port 3 Mode
Port 2 Mode
T0 Prescaler
Timer/Counter 0
T1 Prescaler
Timer/Counter 1
Timer Mode
Not Implemented
General-Purpose
Registers
Port 3
Port 2
Reserved
Port 0
RP
IMR
IRQ
IPR
P3M
P2M
PRE0
T0
PRE1
T1
TMR
P3
P2
P1
P0
P01M
FLAGS
Indentifiers
Location
255 (FFH)
254 (FE)
253 (FD)
252 (FC)
251 (FB)
250 (FA)
249 (F9)
248 (F8)
247 (F7)
246 (F6)
245 (F5)
244 (F4)
243 (F3)
242 (F2)
241 (F1H)
4
3
2
1
0 (00H)
128
127 (7FH)
GPR
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