LAPIS Semiconductor ML610421, Руководство пользователя, Страница: 326 / 437

ML610Q421/ML610Q422/ML610421 User’s Manual
Chapter 24 RC Oscillation Type A/D Converter
24 – 22
24.4.2 Functioning P47(RT1), P46(RS1), P45(CS1) and P44(IN1) as the RC-ADC(Ch1)
Set P47MD1-P44MD1 bits(bit7-bit4 of P4MOD1 register) to “0” and set P47MD0-P44MD0(bit7-bit4 of P4MOD0
register) to “1”, for specifying the RC-ADC as the secondary function of P47, P46, P45 and P44.
Reg. name P4MOD1 register (Address: 0F225H)
Bit 7 6 5 4 3 2 1 0
Bit name
P47MD1 P46MD1 P45MD1 P44MD1 P43MD1 P42MD1 P41MD1 P40MD1
Data 0 0 0 0 * * * *
Reg. name P4MOD0 register (Address: 0F224H)
Bit 7 6 5 4 3 2 1 0
Bit name
P47MD0 P46MD0 P45MD0 P44MD0 P43MD0 P42MD0 P41MD0 P40MD0
Data 1 1 1 1 * * * *
Set P47C1-P44C1 bit(bit7-4 of P4CON1 register) to “0”, set P47C0-P44C0 bit(bit7-4 of P4CON0 register) to “0”, and
set P47DIR-P44DIR bit(bit7-4 of P4DIR register) to “1”, for specifying the P47-P44 as high-impedance inputs.
The P47C1-P44C1 bit and P47C0-P44C0 bit can be set to all “1” instead of all “0” to select the high-impedance inputs.
Reg. name P4CON1 register (Address: 0F223H)
Bit 7 6 5 4 3 2 1 0
Bit name
P47C1 P46C1 P45C1 P44C1 P43C1 P42C1 P41C1 P40C1
Data 0 0 0 0 * * * *
Reg. name P4CON0 register (Address: 0F222H)
Bit 7 6 5 4 3 2 1 0
Bit name
P47C0 P46C0 P45C0 P44C0 P43C0 P42C0 P41C0 P40C0
Data 0 0 0 0 * * * *
Reg. name P4DIR register (Address: 0F221H)
Bit 7 6 5 4 3 2 1 0
Bit name
P47DIR P46DIR P45DIR P44DIR P43DIR P42DIR P41DIR P40DIR
Data 1 1 1 1 * * * *
Data of P47D-P44D bits (bit7-4 of P4D register) do not affect to the RC-ADC function, so don’t care the data for the
function.
Reg. name P4D register (Address: 0F220H)
Bit 7 6 5 4 3 2 1 0
Bit name
P47D P46D P45D P44D P43D P42D P41D P40D
Data ** ** ** ** * * * *
* : Bit not related to the RC-ADC channel 1(using P47,P46,P45 and P44) function
** : Don’t care the data
Note:
Status of output pins P31-P34 and P45-P47 changes according to the RC oscillation mode specified by OM0-OM3 bit
of RADMOD register.