A96G140/A96G148/A96A148 User’s manual
20 Development tools
263
As shown in Figure 142
, when transferring data, a receiver outputs the DSDA to ‘L’ to inform the normal
reception of data. If a receiver outputs DSDA to ‘H’, it means error reception of data.
Figure 142. Acknowledge on Serial Bus
While the Host Debugger executes data communications, if a microcontroller needs communication
delay or process delay, it can request communication delay to the Host Debugger.
Figure 143 shows timing diagrams where a microcontroller requests communication delay to the Host
Debugger. If the microcontroller requests timing delay of the DSCL signal that the Host Debugger
outputs, the microcontroller maintains the DSCL signal to ‘L’ to d
elay the clock change although the
Host Debugger changes the DSCL to ‘H’.
Figure 143. Clock Synchronization during Wait Procedure