CHAPTER 12 NBD FUNCTION (
µµµµ
PD70F3116)
634
User’s Manual U14492EJ3V0UD
Table 12-8. Data Packet
ADn_DBG
AD3_DBG
AD2_DBG
AD1_DBG
AD0_DBG
1st
D3
D2
D1
D0
2nd
D7
D6
D5
D4
Caution
Read data is 8-bit fixed-length.
12.4.2 Event detection function
By having a comparator (24-bit address setting) for match detection on-chip at a single point, this function detects
match of the address setting registers shown below and outputs a match trigger (falling edge) to the NBD tool. Event
trigger output is low active and during the active period it is output synchronous with the system clock of the target
CPU. The active width is one cycle of the internal system clock of the CPU.
(1) Event detection conditions
•
Execution PC address match
Match detection range for timing of a write to a set address in the internal RAM area
XFFFC000H to XFFFE7FFH
(2) Event detection function control register
(a) NBD event condition setting register (EVTU_C)
7
0
EVTU_C7 to
EVTU_C0
6
0
5
0
4
0
3
0
2
0
1
0
0
PCU/DTU
NBD space address
820H
Initial value
Undefined
Bit Position
Bit Name
Function
0
PCU/DTU
Selects an execution PC event or RAM access event.
0: Internal RAM access event is in valid
Note
1: Execution PC event is in valid
Note
If the EVTU_C register is set outside the internal RAM area, an event also
is output when writing outside the RAM.
Содержание V850E/IA1 mPD703116
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