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Re: 急問~關於873a與876問題
#2
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版主


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1. 876 轉到 876A 有可能是 876A 多了電壓比較器功能,如果不使用的話要 dsiable Voltage Comparator 功能,還有兩著的自我燒錄方式不一樣,876 可以一個 word 燒錄,但876A 就需一個區塊燒錄。

2. 如果要使用 16F886 需看一下 migration manual 裡的說明 :
http://ww1.microchip.com/downloads/en/DeviceDoc/41305A.pdf

順便一提的是 PIC16F88x 的燒錄問題,在做燒錄時須將 RB3 這隻腳 (Low Voltage Programming) 接個電阻下地,以避免進入低壓燒錄模式,有關佌說明請參考底下的 Errata :
http://ww1.microchip.com/downloads/en/DeviceDoc/80302D.pdf

1. Module: Low-Voltage In-Circuit Serial
Programming™
If LVP (Low-Voltage Programming) mode is
enabled, programming the device using the VPP
pin while holding high or toggling the port pin
RB3/PGM during Program mode could disrupt the
programming sequence.
Work around
Pull down pin RB3/PGM using external circuitry
during programming of the device.

發表於: 2008/7/29 8:40
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急問~關於873a與876問題
#1
新會員
新會員


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近來程式寫到不夠
轉換成8k容量pic16f876
正常來說原本4k程式不變
新增加4k
但是舊有程式燒入到876即無法執行
不知道問題出在哪?

另外請問一下
876與876a只有製程上不同嗎?
那是否也可以用pic16f886替代?
因為價格上似乎更便宜
但是如果以舊程式套入是否有需要注意修改的地方

發表於: 2008/7/26 13:22
Twitter Facebook Google Plus Linkedin Del.icio.us Digg Reddit Mr. Wong 頂部







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