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CHAPTER 17 UART
17.7.4
Master-slave Communication Function (Multiprocessor
Mode)
With UART, communication with multiple CPUs connected in master-slave mode is
available in operation mode 1. However, UART can be used only from the master
system.
■
Master-slave Communication Function
The settings shown in Figure 17.7-7 are required to operate UART in multiprocessor mode (operation
mode 1).
Figure 17.7-7 Settings for UART Operation Mode 1
●
Inter-CPU connection
As shown in Figure 17.7-8, a communication system consists of one master CPU and multiple slave CPUs
connected to two communication lines. UART can be used only from the master CPU.
Figure 17.7-8 Connection Example of UART Master-slave Communication
CL AD
TXE
REC
PEN P
S
BL
S
CR0/
S
CR1,
S
MR0/
S
MR1
0
1
0
0
1
0
RIE TIE
C
S
1 C
S
0
S
CKE
S
OE
R
S
T
MD1 MD0 C
S
2
RDRFTDRE
PE OREFRE
SS
R0/
SS
R1,
S
IDR0/
S
IDR1
S
ODR0/
S
ODR1
DDR4 (UART0)
S
et tr
a
n
s
mi
ss
ion d
a
t
a
(d
u
ring writing).
Ret
a
in receive d
a
t
a
(d
u
ring re
a
ding).
: Bit
us
ed
x : Bit not
us
ed
1 :
S
et "1"
0 :
S
et "0"
:
S
et "0" to
us
e
a
n inp
u
t pin
×
×
DDR6 (UART1)
×
BD
S
RXE
b
it 15
14
1
3
12
11
10
9
8
7
6
5
4
3
2
0
1
Slave CPU #0
Slave CPU #1
SOT
SIN
SOT
SIN
Master CPU
SIN0/SIN1
SOT0/SOT1
Summary of Contents for MB90460 Series
Page 1: ...The following document contains information on Cypress products ...
Page 3: ......
Page 5: ......
Page 9: ...iv ...
Page 41: ...22 CHAPTER 1 OVERVIEW ...
Page 45: ...26 CHAPTER 2 NOTES ON HANDLING DEVICES ...
Page 83: ...64 CHAPTER 3 CPU ...
Page 95: ...76 CHAPTER 4 RESET ...
Page 107: ...88 CHAPTER 5 CLOCK ...
Page 131: ...112 CHAPTER 6 LOW POWER CONSUMPTION MODE ...
Page 175: ...156 CHAPTER 7 INTERRUPT ...
Page 181: ...162 CHAPTER 8 MODE SETTING ...
Page 223: ...204 CHAPTER 9 I O PORT ...
Page 237: ...218 CHAPTER 10 TIME BASE TIMER ...
Page 247: ...228 CHAPTER 11 WATCHDOG TIMER ...
Page 275: ...256 CHAPTER 12 16 BIT RELOAD TIMER ...
Page 373: ...354 CHAPTER 14 MULTI FUNCTIONAL TIMER ...
Page 485: ...466 CHAPTER 16 PWC Timer ...
Page 531: ...512 CHAPTER 17 UART ...
Page 559: ...540 CHAPTER 19 DELAYED INTERRUPT GENERATOR MODULE ...
Page 589: ...570 CHAPTER 20 8 10 BIT A D CONVERTER ...
Page 601: ...582 CHAPTER 21 ROM CORRECTION FUNCTION ...
Page 633: ...614 CHAPTER 23 512K 1024K BIT FLASH MEMORY ...
Page 645: ...626 CHAPTER 24 EXAMPLE OF F2 MC 16LX MB90F462 F462A F463A CONNECTION FOR SERIAL WRITING ...
Page 715: ...696 APPENDIX ...
Page 716: ...697 INDEX INDEX The index follows on the next page This is listed in alphabetic order ...
Page 739: ......