C515C_9711 Datasheet, PDF (131/268 Pages) Siemens Semiconductor Group – 8-Bit CMOS Microcontroller

On-Chip Peripheral Components
C515C
6.4.5 Master/Slave Mode Selection
The selection whether the SSC operates in master mode or in slave mode has to be made
depending on the hardware configuration before the SSC will be enabled.
Normally a specific device will operate either as master or as slave unit. The SSC has no on-chip
support for multimaster configurations (switching between master and slave mode operation).
Operating the SSC as a master in a multimaster environment requires external circuitry for
swapping transmit and receive lines.
SCLK
Master SSC ^STO
SRI
Px.x Px.y Px.z
SCLK
SRI
STO ^{Slave SSC}
SLS
SCLK
SRI
STO ^{Slave SSC}
SLS
Dedicated
Slave Select
Lines
SCLK
SRI
STO ^{Slave SSC}
SLS
SCLK
SRI
STO ^{Slave SSC}
SLS
Common
Slave Select
Lines
MCS02439
Figure 6-38
Typical SSC System Configuration
Semiconductor Group
6-68
1997-11-01