MC68HC711E20CFN2 Freescale Semiconductor, MC68HC711E20CFN2 Datasheet - Page 179

• Manufacturer Part Number: MC68HC711E20CFN2
• Description: IC MCU 20K 2MHZ OTP 52-PLCC
• Manufacturer: Freescale Semiconductor
• Series: HC11r

Specifications of MC68HC711E20CFN2

• Core Processor: HC11
• Core Size: 8-Bit
• Speed: 2MHz
• Connectivity: SCI, SPI
• Peripherals: POR, WDT
• Number Of I /o: 38
• Program Memory Size: 20KB (20K x 8)
• Program Memory Type: OTP
• Eeprom Size: 512 x 8
• Ram Size: 768 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

M68HC11E Family — Rev. 3.2
MOTOROLA
* SCP2 present on MC68HC(7)11E20 only
CLOCK GENERATOR
OSCILLATOR AND
(DIVIDE BY FOUR)
( 2, 4, 16, 32)
PRESCALER
( 1, 4, 8, 16)
PRESCALER
PRESCALER
( 1, 3, 4, 13)
SPR[1:0]
SCP[1:0]
PR[1:0]
TCNT
IC/OC
E 2
E
The COP watchdog clock input (E 2
counter chain. The COP automatically times out unless it is serviced
within a specific time by a program reset sequence. If the COP is allowed
to time out, a reset is generated, which drives the RESET pin low to reset
the MCU and the external system. Refer to
frequencies and periods.
2
13
6
Figure 9-1. Timer Clock Divider Chains
SCP2
39
TOF
*
CLEAR COP
TIMER
4
E 2
( 1, 2, 4,....128)
Timing System
( 1, 4, 16, 64)
PRESCALER
PRESCALER
PRESCALER
15
(÷ 1, 2, 4, 8)
SCR[2:0]
RTR[1:0]
CR[1:0]
S
R
FF1
Q
Q
SYSTEM
RESET
15
16
) is tapped off of the free-running
Table 9-1
AS
E CLOCK
INTERNAL BUS CLOCK (PH2)
SPI
SCI RECEIVER CLOCK
SCI TRANSMIT CLOCK
PULSE ACCUMULATOR
REAL-TIME INTERRUPT
S
R
FF2
Q
Q
for crystal-related
FORCE
RESET
COP
E SERIES TIM DIV CHAIN
Timing System
Technical Data
Introduction
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