TMP93CS44 datasheet(183/224 Pages) TOSHIBA

183 / 224 page

TMP93CS44/S45

2004-02-10

93CS44-181

Table 3.11.2 shows the relations between AD conversion modes and interrupt request.

Table 3.11.2 Relation between AD Conversion Modes and Interrupt Request

ADMOD0

Mode

Interrupt Request

Timing

Fixed channel

single conversion mode

After conversion

Channel scan

single conversion mode

After conversion

After every conversion

Fixed channel repeat

conversion mode

After every fourth

conversion

Channel scan

repeat conversion mode

After every scan

conversion

X: Don’t Care

(5) AD conversion time

140 states (14

µs at fc = 20 MHz) are required for AD conversion of one channel.

(6) Storing and reading the AD conversion result

AD conversion results are stored in AD conversion result registers high/low

(ADREG04H/L to ADREG37H/L). These registers are read only.

In fixed channel repeat conversion mode, AD conversion results are stored in order

from ADREG04H/L to ADREG37H/L. Except in this mode, AD conversion results for

channel AN0 and AN4, AN1 and AN5, AN2 and AN6, AN3 and AN7 are stored

severally ADREG04H/L, ADREG15H/L, ADREG26H/L, ADREG37H/L.

Table 3.11.3 shows correspondence between analog input channels and AD

conversion result registers.

Table 3.11.3 Correspondence between Analog Input Channels and

AD Conversion Result Registers

Analog Input

Channel (port 5)

Conversion Modes

except Right

Fixed Channel Repeat

Conversion Mode

(Every fourth conversion)

AN0

ADREG04H/L

AN1

ADREG15H/L

AN2

ADREG26H/L

AN3

ADREG37H/L

AN4

ADREG04H/L

AN5

ADREG15H/L

AN6

ADREG26H/L

AN7

ADREG37H/L

ADREG04H/L

ADREG15H/L

ADREG26H/L

ADREG37H/L

AD conversion result registers bit0 is AD conversion result stored flag <ADRxRF>.

The flag shows that whether those registers are read or not. When AD conversion

results are stored in those registers (ADREGxH or ADREGxL), this flag is set to 1.

When each register is read, this flag is cleared to 0, and AD conversion end flag

ADMOD0<EOCF> is also cleared to 0.

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