
R01UH0336EJ0102 Rev.1.02
Page 321 of 1538
Jul 17, 2014
V850E2/PG4-L
Section 9 Safety Functions
(2)
BSEQ0CTL - Self-Diagnostic BIST Control Register
This register is used to specify whether to skip or execute Self-diagnostic BIST.
The register is not a target for Self-Diagnostic BIST and has a majority circuit.
Since this register is write-protected, it is only accessible by following the
designated sequence (regarding the designated sequence for the BSEQ0CTL
register, refer to Section 8.2.10, Protection for Registers of the Reset
Controller).
Protection command register: CSCPCMD register
Protection status register: CSCPS register
This registers are initialized when the power supply is turned on or the power
supply voltage for the internal regulator (VDD) falls below the detection voltage
indicated for the POF.
Access
This register can be read/written in 8-bit units.
Address
FF42 0040
H
Initial value
01
H
Caution
After writing to this register, read it to check that writing has been successful.
Also check that the setting of the register matched the result of Self-Diagnostic
BIST execution after release from the reset state. When the setting of the
BSEQ0CTL and a reset source are in contention, the effectiveness of the
setting of the BSEQ0CTL register is not guaranteed.
Caution
After executing the instruction to write to this register, the completion of actual
writing takes time. Ensure an interval of at least 6 cycles of the PLL input clock
between consecutive rounds of writing to this register.
Example: When heapclk is running at 80 MHz, ensure an interval of at least 60
cycles of heapclk. When the interval is shorter than this cycle, the register will
not reflect the second value. For reading after writing, ensure an interval of
three cycles of the PLL input clock.
Example: When heapclk is running at 80 MHz, ensure an interval of at least 30
cycles of heapclk.
7
6
5
4
3
2
1
0
0
0
0
0
0
0
0
HWBISTEN
R
R
R
R
R
R
R
R/W
Table 9-11
Contents of the BSEQ0CTL Register
Bit Position
Bit Name
Function
0
HWBISTEN
This bit specifies execution or skipping of self-diagnostic BIST.
0: Self-Diagnostic BIST is skipped.
1: Self-Diagnostic BIST is executed.
Содержание V850 Series
Страница 1556: ...V850E2 PG4 L R01UH0336EJ0102 Back Cover ...