参数资料
型号: M34518E8SP
元件分类: 微控制器/微处理器
英文描述: 4-BIT, OTPROM, 6 MHz, MICROCONTROLLER, PDIP32
封装: 8.90 X 28 MM, 1.78 MM PITCH, PLASTIC, SDIP-32
文件页数: 77/162页
文件大小: 1149K
代理商: M34518E8SP
Rev.3.01
2005.06.15
page 19 of 157
REJ03B0008-0301
4518 Group
PROGRAM MEMORY (ROM)
The program memory is a mask ROM. 1 word of ROM is composed
of 10 bits. ROM is separated every 128 words by the unit of page
(addresses 0 to 127). Table 1 shows the ROM size and pages. Fig-
ure 10 shows the ROM map of M34518M8/E8.
Table 1 ROM size and pages
Part number
M34518M2
M34518M4
M34518M6
M34518M8/E8
ROM (PROM) size
( 10 bits)
2048 words
4096 words
6144 words
8192 words
Pages
16 (0 to 15)
32 (0 to 31)
48 (0 to 47)
64 (0 to 63)
A part of page 1 (addresses 008016 to 00FF16) is reserved for in-
terrupt addresses (Figure 11). When an interrupt occurs, the
address (interrupt address) corresponding to each interrupt is set
in the program counter, and the instruction at the interrupt address
is executed. When using an interrupt service routine, write the in-
struction generating the branch to that routine at an interrupt
address.
Page 2 (addresses 010016 to 017F16) is the special page for sub-
routine calls. Subroutines written in this page can be called from
any page with the 1-word instruction (BM). Subroutines extending
from page 2 to another page can also be called with the BM in-
struction when it starts on page 2.
ROM pattern (bits 9 to 0) of all addresses can be used as data ar-
eas with the TABP p instruction.
Fig. 10 ROM map of M34518M8/E8
Fig. 11 Page 1 (addresses 008016 to 00FF16) structure
90
87
654
321
Interrupt address page
000016
008016
017F16
Subroutine special page
007F16
00FF16
010016
1FFF16
018016
Page 1
Page 2
Page 0
Page 3
Page 63
90
8765
432
1
External 0 interrupt address
008016
008216
008416
Timer 1 interrupt address
Timer 2 interrupt address
008616
008816
008A16
008C16
008E16
00FF16
A/D interrupt address
External 1 interrupt address
Timer 3 interrupt address
Timer 4 interrupt address
Serial I/O interrupt address
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M34518M2-XXXFP 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PQFP32
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