MC68HC705B16CFN Freescale Semiconductor, MC68HC705B16CFN Datasheet - Page 155

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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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A.2
The self-check function available on the MC68HC05B4 provides an internal capability to
determine if the device is functional. Self-check is performed using the circuit shown in
Port C pins PC0–PC3 are monitored for the self-check results (light emitting diodes are shown but
other devices could be used), and are interpreted as described in
is entered by applying 2 x V
resistor) to the TCAP1 pin and then depressing the reset switch to execute a reset. After reset, the
following tests are performed automatically and once completed they continually repeat. A good
device will exhibit flashing LEDs; a bad device will be indicated by the LEDs holding at one value.
Note:
Caution: This document includes descriptions of the various self-check and bootstrap
MC68HC05B6
Rev. 4.1
I/0
RAM
ROM
Timer
SCI
A/D
PLM
Interrupts —
Watchdog—
Self-check code can be obtained from your local Freescale representative.
mechanisms that are currently implemented as firmware in the non-user ROM areas of
the MC68HC05B6 and related devices.
As these firmware routines are intended primarily to help Freescale’s engineers test the
devices, they may be changed or removed at any time.
For this reason, Freescale recommends the self-check and bootstrap routines are not
called from the user software. Customers who do call these routines from the user
software do so at their own risk.
Self-check mode
Functionally exercises ports A, B, C and D
Transmission test; check for RDRF, TDRE, TC and FE flags
Check A/D functionality on internal channels: VRL, VRH and (VRL +
Counter test for each RAM byte
Exclusive OR with odd ones parity result
Tracks counter registers and checks ICF1, ICF2, OCF1, OCF2 and TOF
Checks the PLM basic functionality
Tests external timer and SCI interrupts
Tests the watchdog
flags
VRH)/2
DD
dc (via a 4.7kΩ resistor) to the IRQ pin and 5V dc input (via a 4.7kΩ
MC68HC05B4
Table
A-3. The self-check mode
Figure
Freescale
A-3.
A-5
14

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