参数资料
型号: P89C54UBAA
厂商: NXP SEMICONDUCTORS
元件分类: 微控制器/微处理器
英文描述: 80C51 8-bit microcontroller family 4K/8K/16K/32K Flash
中文描述: 8-BIT, FLASH, 33 MHz, MICROCONTROLLER, PQCC44
封装: PLASTIC, MO-047AC, SOT-187-2, LCC-44
文件页数: 16/32页
文件大小: 212K
代理商: P89C54UBAA
Philips Semiconductors
Product specification
89C51/89C52/89C54/89C58
80C51 8-bit microcontroller family
4K/8K/16K/32K Flash
1999 Oct 27
16
SMOD1
SMOD0
POF
GF1
GF0
PD
IDL
PCON
(87H)
SM0 / FE
SM1
SM2
REN
TB8
RB8
TI
RI
SCON
(98H)
D0
D1
D2
D3
D4
D5
D6
D7
D8
STOP
BIT
DATA BYTE
ONLY IN
MODE 2, 3
START
BIT
SET FE BIT IF STOP BIT IS 0 (FRAMING ERROR)
SM0 TO UART MODE CONTROL
0 : SCON.7 = SM0
1 : SCON.7 = FE
SU01191
Figure 8. UART Framing Error Detection
SM0
SM1
SM2
REN
TB8
RB8
TI
RI
SCON
(98H)
D0
D1
D2
D3
D4
D5
D6
D7
D8
1
1
1
0
COMPARATOR
1
1
X
RECEIVED ADDRESS D0 TO D7
PROGRAMMED ADDRESS
IN UART MODE 2 OR MODE 3 AND SM2 = 1:
INTERRUPT IF REN=1, RB8=1 AND “RECEIVED ADDRESS” = “PROGRAMMED ADDRESS”
– WHEN OWN ADDRESS RECEIVED, CLEAR SM2 TO RECEIVE DATA BYTES
– WHEN ALL DATA BYTES HAVE BEEN RECEIVED: SET SM2 TO WAIT FOR NEXT ADDRESS.
SU00045
Figure 9. UART Multiprocessor Communication, Automatic Address Recognition
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