UPD784938 Datasheet, PDF (573/733 Pages) NEC – 16-Bit Single-Chip Microcontrollers

CHAPTER 23 INTERRUPT FUNCTIONS
(3) Example of use of type A
An example is shown below in which data received via the asynchronous serial interface is transferred to a buffer area
in on-chip RAM.
Figure 23-24. Asynchronous Serial Reception
(Internal RAM)
0FE7FH
MSC 0EH
SFRP 8CH^Note
–1
Note Low-order 8 bits of RXB address
0FE70H
Channel pointer 7FH
Mode register 11H
Type A, SFR → memory, 8-bit transfer,
interrupt request generation when
MSC = 0
Internal bus
RXD/P30
Receive buffer
(RXB)
Shift register
INTSR macro service request
Remark Addresses in the figure are the values when the LOCATION 0 instruction is executed.
When the LOCATION 0FH instruction is executed, 0F0000H should be added to the values in the figure.
Preliminary User’s Manual U13987EJ1V0UM00
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