MC68HC705B16CFN Freescale Semiconductor, MC68HC705B16CFN Datasheet - Page 72

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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
Internal
processor clock
Internal
timer clocks
16-bit
counter
Output compare
register
5
Compare register
latch
Output compare
flag and TCMP1,2
Note:
1
The CPU write to the compare registers may take place at any time, but a compare only occurs at timer state
T01. Thus a four cycle difference may exist between the write to the compare register and the actual compare.
1) The output compare flag is set at the timer state T11 that follows the comparison match ($F457 in this example).
Figure 5-4 Timer state timing diagram for output compare
Internal
processor clock
Internal
timer clocks
16-bit
counter
Timer overflow
flag
Note:
The timer overflow flag is set at timer state T11 (transition of counter from $FFFF to $0000). It is cleared
by a read of the timer status register during the internal processor clock high time, followed by a read of the
counter low register.
Figure 5-5 Timer state timing diagram for timer overflow
Freescale
5-14
T00
T01
T10
T11
$F456
$F457
(Note 1)
CPU writes $F457
(Note 1)
(Note 2)
T00
T01
T10
T11
$FFFF
$0000
PROGRAMMABLE TIMER
$F458
$F459
$F457
$0001
$0002
MC68HC05B6
Rev. 4.1

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