![NEC V850/SC1 User Manual Download Page 130](http://html.mh-extra.com/html/nec/v850-sc1/v850-sc1_user-manual_248178130.webp)
CHAPTER 4 CLOCK GENERATION FUNCTION
128
User’s Manual U15109EJ3V0UD
Table 4-1. Operating Statuses in HALT Mode (2/2)
When CPU Operates on Main Clock
When CPU Operates on Subclock
HALT Mode Setting
Item
When Subclock Does
Not Exist
When Subclock Exists
When Main Clock
Oscillation Continues
When Main Clock
Oscillation Is Stopped
NMI
Operating
INTP0 to INTP3,
INTP7 to INTP9
Operating
INTP4 and INTP5
Operating
Stopped
External
interrupt
request
INTP6
Operates when main
clock is selected for
noise eliminator
Operating
Operates when f
XT
is
selected for noise
eliminator
Key return function
Operating
AD0 to AD15
High impedance
Note 1
A1 to A15
Note 2
Held
Note 1
(high impedance when HLDAK = 0)
A16 to A21
Held
Note 1
(high impedance when HLDAK = 0)
LBEN, UBEN
Held
Note 1
(high impedance when HLDAK = 0)
R/W
DSTB, WRL
Note 2
,
WRH
Note 2
, RD
Note 2
ASTB
High-level output
Note 1
(high impedance when HLDAK = 0)
In
external
expansion
mode
HLDAK
Operating
Notes 1.
Even when the HALT instruction has been executed, the instruction fetch operation continues until the
on-chip instruction prefetch queue becomes full. Once it is full, operation stops in the state shown in
Table 4-1.
2.
Only for the V850/SC1 and V850/SC2