參數(shù)資料
型號： MC68HRC705JP7CP
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDIP28
封裝： PLASTIC, DIP-28
文件頁數(shù)： 20/164頁
文件大小： 1165K
代理商： MC68HRC705JP7CP
Personality EPROM (PEPROM)
MC68HC705JJ7 MC68HC705JP7 Advance Information Data Sheet, Rev. 4.1
116
Freescale Semiconductor
12.2 PEPROM Registers
Two I/O registers control programming and reading of the PEPROM:
The PEPROM bit select register (PEBSR)
The PEPROM status and control register (PESCR)
12.2.1 PEPROM Bit Select Register
The PEPROM bit select register (PEBSR) selects one of 64 bits in the PEPROM array. Reset clears all
the bits in the PEPROM bit select register.
PEB7 and PEB6 — Not connected to the PEPROM array
These read/write bits are available as storage locations. Reset clears PEB7 and PEB6.
PEB5–PEB0 — PEPROM Bit Selects
These read/write bits select one of 64 bits in the PEPROM as shown in Table 12-1. Bits PEB2–0 select
the PEPROM row, and bits PEB5–PEB3 select the PEPROM column. Reset clears PEB5–PEB0,
selecting the PEPROM bit in row zero, column zero.
12.2.2 PEPROM Status and Control Register
The PEPROM status and control register (PESCR) controls the PEPROM programming voltage. This
register also transfers the PEPROM bits to the internal data bus and contains a flag bit when row zero is
selected.
PEDATA — PEPROM Data Bit
This read-only bit is the output state of the PEPROM sense amplifier and shows the state of the
currently selected bit. The state of the PEDATA bit does not affect the programming of the bit selected
by the PEBSR. Reset does not affect the PEDATA bit.
1 = PEPROM data is a logic 1.
0 = PEPROM data is a logic 0.
Address:
$000E
Bit 7
654321
Bit 0
Read:
PEB7
PEB6
PEB5
PEB4
PEB3
PEB2
PEB1
PEB0
Write:
Reset:
00000000
Figure 12-2. PEPROM Bit Select Register (PEBSR)
Address:
$000F
Bit 7
654321
Bit 0
Read:
PEDATA
0
PEPGM
0000
PEPRZF
Write:
RRR
Reset:
U
000000
1
= Unimplemented
R
= Reserved
U = Unaffected
Figure 12-3. PEPROM Status and Control Register (PESCR)
相關PDF資料
PDF描述
MC68HC705SP7CP 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDIP28
MC68HC705JP7CDW 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDSO28
MC68HC705JJ7CDW 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDSO20
MC68HC705JJ7CP 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDIP20
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