C515C_9711 Datasheet, PDF (134/268 Pages) Siemens Semiconductor Group – 8-Bit CMOS Microcontroller

On-Chip Peripheral Components
C515C
6.4.7 Register Description
The SSC interface has six SFRs which are listed in table 6-5.
Table 6-5 Special Function Registers of the SSC Interface
Symbol
SSCCON
SCIEN
SCF
STB
SRB
SSCMOD
Description
SSC Control Register
SSC Interrupt Enable Register
SSC Status Register
SSC Transmit Buffer Register
SSC Receive Buffer Register
SSC Mode Test Register
Address
93H
ACH
ABH
94H
95H
96H
The register SSCCON provides the basic control of the SSC functions like general enable/disable,
mode selections and transmitter control.
Special Function Register SSCCON (Address 93H)
Reset Value : 07H
Bit No.
93H
MSB
7
SCEN
6
TEN
LSB
5
4
3
2
1
0
MSTR CPOL CPHA BRS2 BRS1 BRS0
SSCCON
Bit
SCEN
TEN
MSTR
Function
SSC system enable
SCEN =0 : SSC subsystem is disabled, related pins are available as general I/O.
SCEN=1 : SSC subsystem is enabled.
Slave mode - transmitter enable
TEN =0
: Transmitter output STO will remain in tristate state,
regardless of the state of SLS.
TEN = 1 and SLS = 0 : Transmitter will drive the STO output.
In master mode the transmitter will be enabled all the time, regardless of the setting
of TEN.
Master mode selection
MSTR=0 : Slave mode is selected
MSTR=1 : Master mode is selected
This bit has to be set to the correct value depending on the hardware setup of the
system before the SSC will be enabled. It must not be modified afterwards. There
is no on-chip support for dynamic switching between master and slave mode
operation.
Semiconductor Group
6-71
1997-11-01