MC68HC705B16CFN Freescale Semiconductor, MC68HC705B16CFN Datasheet - Page 97

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MC68HC705B16CFN

Manufacturer Part Number
MC68HC705B16CFN
Description
IC MCU 2.1MHZ 15K OTP 52-PLCC
Manufacturer
Freescale Semiconductor
Series
HC05r
Datasheet

Specifications of MC68HC705B16CFN

Core Processor
HC05
Core Size
8-Bit
Speed
2.1MHz
Connectivity
SCI
Peripherals
POR, WDT
Number Of I /o
32
Program Memory Size
15KB (15K x 8)
Program Memory Type
OTP
Eeprom Size
256 x 8
Ram Size
352 x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Data Converters
A/D 8x8b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
52-PLCC
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Note:
Since the PLM system uses the timer counter, PLM results will be affected while resetting
the timer counter. Both D/A registers are reset to $00 during power-on or external reset.
WAIT mode does not affect the output waveform of the D/A converters.
7.1
Miscellaneous register
Address
Miscellaneous
$000C
SFA — Slow or fast mode selection for PLMA
This bit allows the user to select the slow or fast mode of the PLMA pulse length modulation
output.
1 (set)
Slow mode PLMA (4096 x timer clock period).
0 (clear) –
Fast mode PLMA (256 x timer clock period).
SFB — Slow or fast mode selection for PLMB
This bit allows the user to select the slow or fast mode of the PLMB pulse length modulation
output.
1 (set)
Slow mode PLMB (4096 x timer clock period).
0 (clear) –
Fast mode PLMB (256 x timer clock period).
The highest speed of the PLM system corresponds to the frequency of the TOF bit being set,
multiplied by 256. The lowest speed of the PLM system corresponds to the frequency of the TOF
bit being set, multiplied by 16. Because the SFA bit and SFB bit are not double buffered, it is
mandatory to set them to the desired values before writing to the PLM registers; not doing so could
temporarily give incorrect values at the PLM outputs.
SM — Slow mode
1 (set)
The system runs at a bus speed 16 times lower than normal
(f
/32). SLOW mode affects all sections of the device, including
OSC
SCI, A/D and timer.
0 (clear) –
The system runs at normal bus speed (f
MC68HC05B6
PULSE LENGTH D/A CONVERTERS
Rev. 4.1
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
POR
INTP
INTN
INTE
SFA
SFB
/2).
OSC
State
bit 1
bit 0
on reset
SM
WDOG ?001 000?
7
Freescale
7-3

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