Synchronous Serial Port (SSI)
Am186™CC/CH/CU Microcontrollers User’s Manual
14-7
Figure 14-3
SSI Multiple Transmit with SDEN as External Device Enable
Figure 14-4
SSI Multiple Transmit with PIO as External Device Enable
SDEN
SCLK
SDATA
Set
DE0
bit
Write
transmit
register
PB=0
DR/DT=0
PB=1
DR/DT=0
PB=1
PB=0
DR/DT=1
Write
transmit
register
PB=1
PB=1
DR/DT=0
Write
transmit
register
PB=1
PB=0
DR/DT=1
PB=1
DR/DT=0
PB=0
DR/DT=1
Clear
DE0
bit
PB=0
DR/DT=0
LSB (Normal shift order) MSB
Notes:
SDEN is configured to be active High in the scenario shown above.
Any PIOs used as SSI enables should be inactive while SDEN is active.
The SSI data order is configured to be in Normal mode (LSB first).
The SSI clock is configured to be in Normal mode.
GPIO
SCLK
Set
PIO
bit
Write
transmit
register
PB=0
DR/DT=0
PB=1
DR/DT=0
PB=1
PB=0
DR/DT=1
Write
transmit
register
PB=1
PB=1
DR/DT=0
Write
transmit
register
PB=1
PB=0
DR/DT=1
PB=1
DR/DT=0
PB=0
DR/DT=1
Clear
PIO
bit
SDATA
DATA
Set
DE1
bit
Clear
DE1
bit
PB=0
DR/DT=0
DATA
MSB(Reverse shift order)LSB
Notes:
The SDEN signal should be inactive (DE0=0) while the PIO has enabled the receiving device.
The SSI data order is configured to be in Reverse mode (MSB first).
The SSI clock is configured to be in Inverted Clock mode.
Summary of Contents for Am186 CC
Page 1: ...Am186 CC CH CU Microcontrollers User s Manual Order 21914B...
Page 4: ...iv Am186 CC CH CU Microcontrollers User s Manual...
Page 18: ...Table of Contents xviii Am186 CC CH CU Microcontrollers User s Manual...
Page 24: ...Introduction xxiv Am186 CC CH CU Microcontrollers User s Manual...
Page 40: ...Architectural Overview 1 16 Am186 CC CH CU Microcontrollers User s Manual...
Page 86: ...System Overview 3 36 Am186 CC CH CU Microcontrollers User s Manual...
Page 92: ...Emulator Support 4 6 Am186 CC CH CU Microcontrollers User s Manual...
Page 112: ...DRAM Controller 6 8 Am186 CC CH CU Microcontrollers User s Manual...
Page 134: ...Interrupts 7 22 Am186 CC CH CU Microcontrollers User s Manual...
Page 186: ...Programmable I O Signals 9 8 Am186 CC CH CU Microcontrollers User s Manual...
Page 200: ...Watchdog Timer 11 6 Am186 CC CH CU Microcontrollers User s Manual...
Page 232: ...Asynchronous Serial Ports UARTs 13 24 Am186 CC CH CU Microcontrollers User s Manual...
Page 242: ...Synchronous Serial Port SSI 14 10 Am186 CC CH CU Microcontrollers User s Manual...
Page 264: ...High Level Data Link Control HDLC 15 22 Am186 CC CH CU Microcontrollers User s Manual...
Page 332: ...Universal Serial Bus USB 18 34 Am186 CC CH CU Microcontrollers User s Manual...
Page 348: ...Register Summary A 16 Am186 CC CH CU Microcontrollers User s Manual...
Page 376: ...Index Index 18 Am186 CC CH CU Microcontrollers User s Manual...