Application Of Uart (During Operation In Mode 1) - Fujitsu F2MC-16LX Hardware Manual

CHAPTER 17 UART

17.5 Application of UART (During Operation in Mode 1)

Mode 1 is used if multiple slave CPUs are connected to one host CPU. This UART only
support the host communication interface (see Figure 17.5-1).
■ Application of UART (During Operation in Mode 1)
SOT
SIN
Host CPU
As shown in Figure 17.5-2, communication begins once the host CPU transfers address data.
The address data means the data when the A/D of the SCR register is "1". This allows one of
the slave CPUs to be selected as the receiver for communication with the host CPU. Normally,
the data when the A/D of the SCR register is "0" is used.
In this mode, the parity check function is not available. Therefore, set the PEN bit of the SCR
register to "0".
280
Figure 17.5-1 Example of System Configuration in Mode 1
SOT SIN
Slave CPU#0
SOT SIN
Slave CPU#1