XC68HC705B32CFN Freescale Semiconductor, XC68HC705B32CFN Datasheet - Page 103

• Manufacturer Part Number: XC68HC705B32CFN
• Description: IC MCU 2.1MHZ 32K OTP 52-PLCC
• Manufacturer: Freescale Semiconductor
• Series: HC05r

Specifications of XC68HC705B32CFN

• Core Processor: HC05
• Core Size: 8-Bit
• Speed: 2.1MHz
• Connectivity: SCI
• Peripherals: POR, WDT
• Number Of I /o: 32
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: OTP
• Eeprom Size: 256 x 8
• Ram Size: 528 x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x8b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 52-PLCC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

ADON — A/D converter on
The ADON bit allows the user to enable/disable the A/D converter.
When the A/D converter is switched on, it takes a time t
(see
in the incorrect operation of the A/D, even after t
to be cleared and set again.
Power-on or external reset will clear the ADON bit, thus disabling the A/D converter.
CH3–CH0 — A/D channels 3, 2, 1 and 0
The CH3–CH0 bits allow the user to determine which channel of the A/D converter multiplexer is
selected. See
Reset clears the CH0–CH3 bits.
MC68HC05B6
Rev. 4.1
Table 11-6
1 (set)
0 (clear) –
Table 8-2
and
–
Table
A/D converter is switched on.
A/D converter is switched off.
for channel selection.
CH3
11-7). Using the A/D converter before this time has elapsed may result
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
ANALOG TO DIGITAL CONVERTER
Table 8-2 A/D channel assignment
CH2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
CH1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
ADON
CH0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
has elapsed. In this case ADON would have
ADON
Channel selected
(VRH + VRL) / 2
VRH pin (high)
VRL pin (low)
VRL pin (low)
VRL pin (low)
VRL pin (low)
VRL pin (low)
VRL pin (low)
AN0
AN1
AN2
AN3
AN4
AN5
AN6
AN7
for the current sources to stabilize
Freescale
8-5
8