MC68HC811E2FN Freescale Semiconductor, MC68HC811E2FN Datasheet - Page 47
MC68HC811E2FN
Manufacturer Part Number
MC68HC811E2FN
Description
Manufacturer
Freescale Semiconductor
Datasheet
1.MC68HC811E2FN.pdf
(242 pages)
Specifications of MC68HC811E2FN
Cpu Family
HC11
Device Core Size
8b
Frequency (max)
4MHz
Interface Type
SCI/SPI
Program Memory Type
ROMLess
Program Memory Size
Not Required
Total Internal Ram Size
256Byte
# I/os (max)
38
Number Of Timers - General Purpose
8
Operating Supply Voltage (typ)
3.3/5V
Operating Supply Voltage (max)
5.5V
Operating Supply Voltage (min)
3V
On-chip Adc
8-chx8-bit
Instruction Set Architecture
CISC
Operating Temp Range
0C to 70C
Operating Temperature Classification
Commercial
Mounting
Surface Mount
Pin Count
52
Package Type
PLCC
Lead Free Status / Rohs Status
Supplier Unconfirmed
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IRQE — Configure IRQ for Edge-Sensitive Only Operation Bit
DLY — Enable Oscillator Startup Delay Bit
CME — Clock Monitor Enable Bit
Bit 2 — Not implemented
CR[1:0] — COP Timer Rate Select Bits
2.4 EPROM/OTPROM
Certain devices in the M68HC11 E series include on-chip EPROM/OTPROM. For instance:
Standard MC68HC71E9 and MC68HC711E20 devices are shipped with the EPROM/OTPROM contents
erased (all 1s). The programming operation programs zeros. Windowed devices must be erased using a
suitable ultraviolet light source before reprogramming. Depending on the light source, erasing can take
from 15 to 45 minutes.
Using the on-chip EPROM/OTPROM programming feature requires an external 12-volt nominal power
supply (V
(PPROG).
PPROG is the combined EPROM/OTPROM and EEPROM programming register on all devices with
EPROM/OTPROM except the MC68HC711E20. For the MC68HC711E20, there is a separate register for
EPROM/OTPROM programming called the EPROG register.
As described in the following subsections, these two methods of programming and verifying EPROM are
possible:
Freescale Semiconductor
1. Programming an individual EPROM address
2. Programming the EPROM with downloaded data
Refer to
Refer to
Always reads 0
The internal E clock is divided by 2
determine a scaling factor for the watchdog timer. Refer to
•
•
•
0 = The oscillator startup delay coming out of stop mode is bypassed and the MCU resumes
1 = A delay of approximately 4000 E-clock cycles is imposed as the MCU is started up from the stop
The MC68HC711E9 devices contain 12 Kbytes of on-chip EPROM (OTPROM in non-windowed
package).
The MC68HC711E20 has 20 Kbytes of EPROM (OTPROM in non-windowed package).
The MC68HC711E32 has 32 Kbytes of EPROM (OTPROM in non-windowed package).
PPE
processing within about four bus cycles.
power-saving mode. This delay allows the crystal oscillator to stabilize.
Chapter 5 Resets and
Chapter 5 Resets and
). Normal programming is accomplished using the EPROM/OTPROM programming register
Interrupts.
Interrupts.
M68HC11E Family Data Sheet, Rev. 5.1
15
before it enters the COP watchdog system. These control bits
Chapter 5 Resets and
Interrupts.
EPROM/OTPROM
47
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