mc68hc11f1cpu5 Freescale Semiconductor, Inc, mc68hc11f1cpu5 Datasheet - Page 56

• Manufacturer Part Number: mc68hc11f1cpu5
• Description: 8-bit Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

ADR1 – ADR4 — A/D Results
OPTION — System Configuration Options
ADPU — A/D Power Up
CSEL — Clock Select
Bits [5:0] — Refer to 4.3 System Initialization Registers, page 23.
56
RESET:
MOTOROLA
Percentage
NOTES:
$x031
$x032
$x033
$x034
Each read-only result register holds an eight-bit conversion result. Writes to these registers have no ef-
fect. Data in the A/D converter result registers is valid when the CCF flag in the ADCTL register is set,
indicating a conversion sequence is complete. If conversion results are needed sooner, refer to Figure
16, which shows the A/D conversion sequence diagram.
1. % of V RH –V RL
2. Volts for V RL = 0; V RH = 5.0 V
*Can be written only once in first 64 cycles out of reset in normal modes, or at any time in special modes.
Volts
0 = A/D powered down
1 = A/D powered up
0 = A/D and EEPROM use system E-Clock
1 = A/D and EEPROM use internal RC clock
2
1
ADPU
Bit 7
Bit 7
Bit 7
Bit 7
Bit 7
0
2.500
Bit 7
50%
Table 25 Analog Input to 8-Bit Result Translation Table
CSEL
6
6
6
6
6
0
1.250
25%
6
IRQE*
5
5
5
5
5
0
12.5%
0.625
5
DLY*
4
4
4
4
4
1
0.3125
6.25%
4
CME
3
3
3
3
3
0
0.1562
3.12%
3
FCME*
2
2
2
2
2
0
0.0781
1.56%
2
CR1*
1
1
1
1
1
0
0.0391
0.78%
MC68HC11F1/FC0
CR0*
MC68HC11FTS/D
Bit 0
Bit 0
Bit 0
Bit 0
Bit 0
1
0
$x031 – $x034
0.0195
0.39%
ADR1
ADR2
ADR3
ADR4
Bit 0
$x039