p87c591vfb NXP Semiconductors, p87c591vfb Datasheet - Page 72

• Manufacturer Part Number: p87c591vfb
• Description: Single-chip 8-bit Microcontroller With Can Controller
• Manufacturer: NXP Semiconductors

Philips Semiconductors
2000 Jul 26
handbook, full pagewidth
handbook, full pagewidth
Single-chip 8-bit microcontroller with CAN controller
Fig.29 UART Multiprocessor Communication, Automatic Address Recognition.
In UART Mode 2 or Mode 3 and SM2 = 1:
START
Interrupt if REN = 1, RB8 = 1 and “Received Address” = “Programmed Address”
bit
when own address received, clear SM2 to receive data bytes
when all data bytes have been received: set SM2 to wait for next address.
D0
0 : S0CON.7 = SM0
1 : S0CON.7 = FE
SM0/FE
SMOD1
RECEIVED ADDRESS D0 TO D7
D0
D1
PROGRAMMED ADDRESS
SMOD0
SM1
D1
Fig.28 UART Framing Error Detection.
D2
SM0
1
1
SM2
POF
D2
D3
Set FE BIT if STOP BIT is 0 (FRAMING ERROR)
SM0 to UART MODE CONTROL
SM1
1
0
REN
WLE
D3
DATA byte
D4
72
SM2
COMPARATOR
D4
TB8
GF1
1
D5
REN
D5
1
RB8
GF0
D6
TB8
D6
D7
X
PD
TI
D7
RB8
D8
IDL
RI
MODE 2, 3
only
D8
in
SCON
PCON
(98H)
(87H)
TI
Preliminary Specification
MHI029
STOP
bit
MHI030
RI
P8xC591
SCON
(98H)