參數(shù)資料
型號(hào): MC68HC05K3P
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 2 MHz, MICROCONTROLLER, PDIP16
封裝: PLASTIC, DIP-16
文件頁數(shù): 119/132頁
文件大?。?/td> 2612K
代理商: MC68HC05K3P
Personality EEPROM (PEEPROM)
PEEPROM Serial Programming
MC68HC05K3 — Rev. 5
Technical Data
Personality EEPROM (PEEPROM)
9.6 PEEPROM Serial Programming
The MC68HC05K3 can be programmed, read, or bulk erased in a serial
fashion using the RESET, PB0 and IRQ pins in PEEPROM serial
programming mode.
The RESET pin is used to begin and end sequences and must be
able to toggle from 0 Vdc to VDD.
PB0 serves as the data pin and must be able to toggle from 0 Vdc
to VDD.
IRQ is used as the clock/select line and must be able to toggle
from 0 Vdc to 2 x VDD.
NOTE:
When not in serial programming mode, do not operate the device with
more than VDD on the IRQ pin.
9.6.1 Serial Programming Connections
The required schematic considerations are shown in Figure 9-4. The
serial programming connections can be shared with the application if
certain considerations are met.
1. The application circuitry connected to the PB0 pin must allow this
pin to be used as an input and not driven from some active source
within the application other than the MC68HC05K3. This pin is
driven to a logic high or low level by either an external source or
by the MC68HC05K3 itself.
2. The application circuitry connected to the IRQ pin must be capable
of being driven from an external source to a voltage, VSELCKH.
3. The application circuitry connected to the RESET pin must allow
this pin to be used as an input and not driven from some active
source within the application other than the MC68HC05K3.
4. To use the on-chip charge pump for programming/erasure, the
application circuitry must be capable of being supplied with a VDD
source of at least 2.7 Vdc.
5. The diagram in Figure 9-4 shows the 3-pin RC oscillator
connections. This circuit also works with the 2-pin crystal and RC
oscillators and the PB1/OSC3 pin can be left unconnected in
those cases.
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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ARCHIVED
BY
FREESCALE
SEMICONDUCT
OR,
INC.
2006
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