MC68HC908QY1VDTE Freescale Semiconductor, MC68HC908QY1VDTE Datasheet - Page 58

IC MCU 1.5K FLASH 16-TSSOP

MC68HC908QY1VDTE

Manufacturer Part Number
MC68HC908QY1VDTE
Description
IC MCU 1.5K FLASH 16-TSSOP
Manufacturer
Freescale Semiconductor
Series
HC08r
Datasheet

Specifications of MC68HC908QY1VDTE

Core Processor
HC08
Core Size
8-Bit
Speed
8MHz
Peripherals
LVD, POR, PWM
Number Of I /o
13
Program Memory Size
1.5KB (1.5K x 8)
Program Memory Type
FLASH
Ram Size
128 x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 105°C
Package / Case
16-TSSOP
Processor Series
HC08Q
Core
HC08
Data Bus Width
8 bit
Data Ram Size
128 B
Maximum Clock Frequency
8 MHz
Number Of Programmable I/os
14
Number Of Timers
2
Maximum Operating Temperature
+ 105 C
Mounting Style
SMD/SMT
Development Tools By Supplier
FSICEBASE, M68CBL05AE, DEMO908QB8, DEMO908QC16
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Data Converters
-
Connectivity
-
Lead Free Status / Rohs Status
 Details
Computer Operating Properly (COP)
The COP counter is a free-running 6-bit counter preceded by the 12-bit system integration module (SIM)
counter. If not cleared by software, the COP counter overflows and generates an asynchronous reset after
262,128 or 8176 BUSCLKX4 cycles; depending on the state of the COP rate select bit, COPRS, in
configuration register 1. With a 262,128 BUSCLKX4 cycle overflow option, the internal 12.8-MHz
oscillator gives a COP timeout period of 20.48 ms. Writing any value to location $FFFF before an overflow
occurs prevents a COP reset by clearing the COP counter and stages 12–5 of the SIM counter.
Service the COP immediately after reset and before entering or after exiting
stop mode to guarantee the maximum time before the first COP counter
overflow.
A COP reset pulls the RST pin low (if the RSTEN bit is set in the CONFIG1 register) for 32 × BUSCLKX4
cycles and sets the COP bit in the reset status register (RSR). See
Place COP clearing instructions in the main program and not in an interrupt
subroutine. Such an interrupt subroutine could keep the COP from
generating a reset even while the main program is not working properly.
6.3 I/O Signals
The following paragraphs describe the signals shown in
6.3.1 BUSCLKX4
BUSCLKX4 is the oscillator output signal. BUSCLKX4 frequency is equal to the internal oscillator
frequency, the crystal frequency, or the RC-oscillator frequency.
6.3.2 STOP Instruction
The STOP instruction clears the SIM counter.
6.3.3 COPCTL Write
Writing any value to the COP control register (COPCTL) (see
counter and clears stages 12–5 of the SIM counter. Reading the COP control register returns the low byte
of the reset vector.
6.3.4 Power-On Reset
The power-on reset (POR) circuit in the SIM clears the SIM counter 4096 × BUSCLKX4 cycles after
power up.
6.3.5 Internal Reset
An internal reset clears the SIM counter and the COP counter.
6.3.6 COPD (COP Disable)
The COPD signal reflects the state of the COP disable bit (COPD) in the configuration register 1
(CONFIG1). See
Chapter 5 Configuration Register
58
NOTE
NOTE
Figure
6.4 COP Control
(CONFIG).
MC68HC908QY/QT Family Data Sheet, Rev. 6
13.8.1 SIM Reset Status
Register.
6-1.
Register) clears the COP
Freescale Semiconductor

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