xc2234l-20f80l Infineon Technologies Corporation, xc2234l-20f80l Datasheet - Page 77

• Manufacturer Part Number: xc2234l-20f80l
• Description: Lim 16/32-bit Single-chip Microcontroller With 32-bit Performance Xc2000 Family / Econo Line
• Manufacturer: Infineon Technologies Corporation

PRELIMINARY
Sample time and conversion time of the XC223[04]L’s A/D converters are
programmable. The timing above can be calculated using
The limit values for
Table 21
GLOBCTR.5-0
(DIVA)
000000
000001
000010
:
111110
111111
1) The selected sample time is doubled if broken wire detection is active (due to the presampling phase).
Converter Timing Example A:
Assumptions:
Analog clock
Sample time
Conversion 12-bit:
Conversion 10-bit:
Conversion 8-bit:
Converter Timing Example B:
Assumptions:
Analog clock
Sample time
Conversion 12-bit:
Conversion 10-bit:
Data Sheet
B
B
B
B
B
A/D Converter Computation Table
f
f
t
t
t
t
f
f
t
t
A/D Converter
Analog Clock
f
f
f
f
f
f
SYS
ADCI
S
C12
C10
C8
SYS
ADCI
S
C12
f
SYS
SYS
SYS
SYS
SYS
SYS
ADCI
/ 2
/ 3
/ (DIVA+1)
/ 63
/ 64
must not be exceeded when selecting the prescaler value.
= 80 MHz (i.e.
=
=
= 16 ×
= 12 ×
= 10 ×
= 66 MHz (i.e.
=
=
= 16 ×
f
t
f
t
SYS
ADCI
SYS
ADCI
/ 4 = 20 MHz, i.e.
/ 4 = 16.5 MHz, i.e.
× 2 = 100 ns
t
t
t
× 2 = 121.2 ns
t
ADCI
ADCI
ADCI
ADCI
f
ADCI
+ 2 ×
+ 2 ×
+ 2 ×
+ 2 ×
t
t
SYS
SYS
73
t
t
t
t
SYS
SYS
SYS
SYS
INPCRx.7-0
(STC)
00
01
02
:
FE
FF
= 12.5 ns), DIVA = 03
= 15.2 ns), DIVA = 03
H
H
H
H
H
= 16 × 50 ns + 2 × 12.5 ns = 0.825 μs
= 12 × 50 ns + 2 × 12.5 ns = 0.625 μs
= 10 × 50 ns + 2 × 12.5 ns = 0.525 μs
= 16 × 60.6 ns + 2 × 15.2 ns = 1.0 μs
t
ADCI
t
ADCI
XC2000 Family / Econo Line
= 50 ns
= 60.6 ns
Table
Sample Time
t
t
t
t
t
t
t
S
ADCI
ADCI
ADCI
ADCI
ADCI
ADCI
Electrical Parameters
XC2230L, XC2234L
21.
H
H
, STC = 00
, STC = 00
× 2
× 3
× 4
× (STC+2)
× 256
× 257
V1.0, 2010-12
1)
H
H