Operation - NEC V850ES/KE1+ User Manual

12.4 Operation

If the real-time output operation is enabled by setting the RTPC0.RTPOE0 bit to 1, the data of the RTBH0 and
RTBL0 registers is transferred to the real-time output latch in synchronization with the generation of the selected
transfer trigger (set by the RTPC0.EXTR0 and RTPC0.BYTE0 bits). Of the transferred data, only the data of the bits
specified as real-time output enabled by the RTPM0 register is output from bits RTPOUT00 to RTPOUT05. The bits
specified as real-time output disabled by the RTPM0 register output 0.
If the real-time output operation is disabled by clearing the RTPOE0 bit to 0, the RTPOUT00 to RTPOUT05 signals
output 0 regardless of the setting of the RTPM0 register.
Figure 12-2. Example of Operation Timing of RTO0 (When EXTR0 and BYTE0 Bits = 00)
INTTM51 (internal)
INTTM50 (internal)
CPU operation
RTBH0 D01
RTBL0
RT output latch 0 (H)
RT output latch 0 (L)
A: Software processing by INTTM51 interrupt request signal (write to RTBH0 register)
B: Software processing by INTTM50 interrupt request signal (write to RTBL0 register)
Remark For the operation during standby, refer to CHAPTER 19 STANDBY FUNCTION.
CHAPTER 12 REAL-TIME OUTPUT FUNCTION (RTO)
A B A
D02
D11 D12
D01
D11
User's Manual U16896EJ2V0UD
B A B
D03 D04
D13
D02 D03
D12
A B
D14
D04
D13 D14
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