MC68HC705B16CFN Freescale Semiconductor, MC68HC705B16CFN Datasheet - Page 70

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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

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5
5.6
When the MCU enters STOP mode, the timer counter stops counting and remains at that
particular count value until STOP mode is exited by an interrupt. If STOP mode is exited by
power-on or external reset, the counter is forced to $FFFC but if it is exited by external interrupt
(IRQ) then the counter resumes from its stopped value.
Another feature of the programmable timer is that if at least one valid input capture edge occurs
at one of the TCAP pins while in STOP mode, the corresponding input capture detect circuitry is
armed. This action does not wake the MCU or set any timer flags, but when the MCU does
wake-up there will be an active input capture flag (and data) from that first valid edge which
occurred during STOP mode.
If STOP mode is exited by an external reset then no such input capture flag or data action takes
place even if there was a valid input capture edge (at one of the TCAP pins) during STOP mode.
5.7
The timer system is not affected by WAIT mode and continues normal operation. Any valid timer
interrupt will wake-up the system.
5.8
The relationships between the internal clock signals, the counter contents and the status of the
flag bits are shown in the following figures. It should be noted that the signals labelled ‘internal’
(processor clock, timer clocks and reset) are not available to the user.
Freescale
5-12
Timer during STOP mode
Timer during WAIT mode
Timer state diagrams
PROGRAMMABLE TIMER
MC68HC05B6
Rev. 4.1

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