5

MB88101A

s FUNCTIONAL DESCRIPTION

1. Mode 1

This mode sets the DO pin to “L” and stops conversion upon completion of conversion of 12 bits. To restart

conversion, set CS to “H” once then to “L”. In this mode, converted data is output from the MSB.

• Timing diagram

2. Mode 2

This mode continues conversion until CS becomes “H” after it becomes “L”. Converted data is output from the

LSB, with the first piece of converted data output 20 clock cycles after CS becomes “L”. Changing the channel

select pin settings before starting sampling of one analog input allows another to be converted.

• Timing diagram

CLK

CS

MOD0, 1

DO

Bit

Trial

SAMP

B11

B11

B10 B9 B8 B7 B6 B5 B4 B3 B2 B1 B0

B10 B9

B8

B7

B6

B5

B4

B3

B2

B1

B0

Sampling

Sampling

12345678910 11 12 13 14 15 16

1

2

Hi-z

Hi-z

Hi-z

Hi-z

CS

MOD0, 1

MOD0, 1

Mode 2

CLK

DO

Bit

Trial

SAMP

Hi-z

Hi-z

Hi-z

Hi-z

16CLK

⇒ LSB

⇒ LSB

⇒ MSB

⇒ MSB

⇒ LSB