EM78P350N
8-Bit Microprocessor with OTP ROM
6.1.34 Bank 2 RE (LVDC: LVD Control Register )
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
“0”
“0”
“0”
“0”
LVDEN
/LVD
LVD1
LVD0
There is no LVD function in the ICE350N simulator.
Bits 7 ~ 4: Not used, set to “0” at all time.
Bit 3 (LVDEN): Low Voltage Detect Register
0 : disable LVD
1 : enable LVD
Bit 2 (/LVD): Low Voltage Detector. This is a read only bit. When the Vdd pin voltage is
lower than the LVD voltage interrupt level (selected by LVD1 and LVD0), this bit will be
cleared.
0 : If Vdd < .LVD voltage interrupt level
1 : If Vdd > LVD voltage interrupt level
Bits 1 ~ 0 (LVD1 ~ LVD0) : Low Voltage Detect level select bits
LVDEN
<RE,3>
LVD1, LVD0
<RE,1,0>
LVD Voltage Interrupt Level
LVDIF
1
1
1
1
0
11
10
01
00
XX
2.2V
3.3V
4.0V
4.5V
NA
1*
1*
1*
1*
0
*If Vdd has crossover at LVD voltage interrupt level as Vdd changes, LVDIF =1.
6.1.35 Bank 2 RF (TMR3H: Most Significant Bits (Bit 9 ~ Bit 2) of
PWM3 Timer)
The contents of RF are read-only.
6.1.36 Bank3 R5 (Pull-low Control Register 1)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
/PL57
/PL56
/PL55
/PL54
/PL53
/PL52
/PL51
/PL50
Bank 3 R5 register is both readable and writable.
Bit 7 (/PL57): Control bit is used to enable the pull-high of the P57 pin.
0 = Enable pull-low output
1 = Disable pull-low output
Bit 6 (/PL56): Control bit is used to enable the pull-low function of the P56 output pin.
Bit 5 (/PL55): Control bit is used to enable the pull-low function of the P55 output pin.
Bit 4 (/PL54): Control bit is used to enable the pull-low function of the P54 output pin.
Bit 3 (/PL53): Control bit is used to enable the pull-low function of the P53 output pin.
Bit 2 (/PL52): Control bit is used to enable the pull-low function of the P52 output pin.
Bit 1 (/PL51): Control bit is used to enable the pull-low function of the P51 output pin.
Bit 0 (/PL50): Control bit is used to enable the pull-low function of the P50 output pin.
24 •
Product Specification (V1.0) 09.14.2006
(This specification is subject to change without further notice)
ELAN [ ELAN MICROELECTRONICS CORP ]
