Datasheet

Datasheet

22/34

BD9271KUT

TSZ02201-0F1F0C100260-1-2

27.Feb.2015 Rev.004

www.rohm.com

TSZ22111・15・001

MOSSHORT

(example) ERRMSK[1:0]＝10b (ERR MASK count：08d)

Zoom (A) is the operation of ERROR detection.

(1)…When the abnormal signal MOSSHORT_ERR(internal signal) is detected, and PWM=L, the abnormal condition is detected,

ERRMSK counter starts.

(2)…When ERRMSK counter reaches to the register ERRMSK[1:0]=10b, the condition is judged to the abnormal. The internal

signal ERR_judge=H.

(3)…The external pin ERR_DET turns to ERR_DET=L within 4 clks of HSYNC.

Zoom (B) is the operation of ERROR release.

(4)…When the abnormal signal is released (MOSSHORT_ERR=L) and PWM=L, ERRMSK counter starts.

(5)…When ERRMSK counter reaches to the register ERRMSK[1:0] =10b, the condition is judged to the normal. The internal

signal ERR_judge=H.

(6)…The external pin ERR_DET turns to ERR_DET=HiZ (High as pulled up) within 4 clks of HSYNC.

Figure 19-2. Timing Chart for Error detection 2