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參數(shù)資料
| 型號： | MC68HC05E6MDWR2 |
| 廠商： | MOTOROLA INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO28 |
| 封裝： | PLASTIC, SOIC-28 |
| 文件頁數(shù)： | 61/140頁 |
| 文件大?。?/td> | 1141K |
| 代理商： | MC68HC05E6MDWR2 |
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Memory and Registers
EPROM (MC68HC705E6 only)
MC68HC05E6 — Rev. 1.0
MOTOROLA
Memory and Registers
27
EPROM
programming
register (PROG)
ELATCH — EPROM latch control
1 = EPROM address and data buses configured for programming.
0 = EPROM address and data buses configured for normal reads.
Causes address and data buses to be latched when a write to EPROM
is carried out. EPROM cannot be read if ELATCH = 1. This bit should not
be set when no programming voltage is applied to the VPP pin.
EPGM — EPROM program control
1 = Programming power connected to the EPROM array.
0 = Programming power disconnected from the EPROM array.
NOTE:
ELATCH and EPGM cannot be set on the same write operation. EPGM
can only be set if ELATCH is set. EPGM is automatically cleared when
ELATCH is cleared.
EPROM
programming
procedure
The following steps should be taken to program a byte of EPROM:
1. Apply the programming voltage VPP to the IRQ/VPP pin.
2. Set the ELATCH bit.
3. Write to the EPROM address.
4. Set the EPGM bit for a time tEPGM to apply the programming
voltage.
5. Clear the ELATCH bit.
If the address bytes A15–A2 do not change, i.e. all bytes are located
within the same 4 byte address block, then multibyte programming is
permitted. The multibyte programming facility allows 4 bytes of data to
be written to the desired addresses after the ELATCH bit has been set
(see Table 1 for multibyte programming entry conditions).
NOTE:
The erased state of the EPROM is $00.
Address
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
State
on reset
EPROM programming (PROG) $001D
00000
ELATCH
0
EPGM 0000 0000
3-mem
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| MC68HC05F32CFU | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:a member of the M68HC05 family of HCMOS |
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