Renesas R61509V - Manual (Page 68)

R61509V Target Spec
Rev. 0.11 April 25, 2008, page 68 of 181
BT[2:0]: Sets the factor used in the step-up circuits. Select the optimal step-up factor for the operating
voltage. To reduce power consumption, set a smaller factor.
Table 41 Step-Up Factor for Step-Up Circuits
BT[2:0] DDVDH VCL VGH VGL
3’h0 Setting inhibited
3’h1
-(VCI1+DDVDH x 2)
[x –5]
3’h2
-(DDVDH x 2)
[x –4]
3’h3
VCI1 x2
[x 2] -VCI1
[x –1]
DDVDH x 3
[x 6]
-(VCI1+DDVDH)
[x –3]
3’h4 Setting inhibited
3’h5
-(VCI1+DDVDH x 2)
[x –5]
3’h6
-(DDVDH x 2)
[x –4]
3’h7
VCI1 x2
[x 2] -VCI1
[x –1]
VCI1+DDVDH
x 2
[x 5]
-(VCI1+DDVDH)
[x –3]
Notes: 1. The factors in the brackets show the step-up factors from VCI1.
2. Make sure DDVDH=max.6.0V, VGH=max.18.0V, VGL=max -13.5V, VGH-VGL=max. 28.0V, and
VCL=max -3.0V.