Datasheet 搜索 > 微控制器 > Microchip（微芯） > PIC18F23K22T-I/MV 数据手册 > PIC18F23K22T-I/MV 其他数据使用手册 5/9 页
器件3D模型￥ 5.71
PIC18F23K22T-I/MV 其他数据使用手册 - Microchip（微芯）
制造商:
Microchip（微芯）
分类:
微控制器
封装:
UQFN-28
描述:
28 /40/ 44引脚，低功耗，高性能的微控制器采用nanoWatt XLP技术 28/40/44-Pin, Low-Power, High-Performance Microcontrollers with nanoWatt XLP Technology
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PIC18F23K22T-I/MV数据手册
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若手册格式错乱，请下载阅览PDF原文件
2010-2015 Microchip Technology Inc. DS80000512J-page 5
PIC18(L)F23/24/43/44K22
6. Module: EUSART
6.1 EUSART Asynchronous Operation
The EUSART asynchronous operation has a
probability of 1 in 256 of missing the Start bit edge
for all combinations of BRGH and BRG16 values,
other than BRGH = 1, BRG16 = 1.
Work around
Set BRGH = 1, and BRG16 = 1 and use this baud
rate formula:
Affected Silicon Revisions
6.2 EUSART Synchronous Operation
In Synchronous mode operation, if SPBRG[H:L] =
0x0001, any character that is put in TXREG while
a character is still in TSR, will transmit TX9D as the
LSb.
Work around
Use the TRMT bit in place of, or in addition to the
TXIF bit to ensure that only one character is set to
transmit at a time
Affected Silicon Revisions
7. Module: MSSP (Master Synchronous
Serial Port)
7.1 SPI Master mode
When the MSSP is used in SPI Master mode and
the CKE bit is clear (CKE = 0), the Buffer Full (BF)
bit and the MSSP Interrupt Flag (SSPIF) bit
become set half an SCK cycle early. If the user
software immediately reacts to either of the bits
being set, a write collision may occur as indicated
by the WCOL bit being set.
Work around
To avoid a write collision one of the following
methods should be used:
Method 1: Add a software delay of one SCK period
after detecting the completed transfer
(the BF bit or SSPIF bit becomes set)
and prior to writing to the SSPBUF
register. Verify the WCOL bit is clear
after writing to SSPBUF. If the WCOL
bit is set, clear the bit in software and
rewrite the SSPBUF register.
Method 2: As part of the MSSP initialization
procedure, set the CKE bit
(CKE = 1).
Affected Silicon Revisions
A1 A2
X
A1 A2
X
X
Baud_Rate FOS C/4 SPBRGH:SPBRGL+1=
A1 A2
X
X
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