MC68HC11F1CPU4 Freescale Semiconductor, MC68HC11F1CPU4 Datasheet - Page 96

• Manufacturer Part Number: MC68HC11F1CPU4
• Description: IC MCU 512 EEPROM 4MHZ 80-LQFP
• Manufacturer: Freescale Semiconductor
• Series: HC11r

Specifications of MC68HC11F1CPU4

• Core Processor: HC11
• Core Size: 8-Bit
• Speed: 4MHz
• Connectivity: SCI, SPI
• Peripherals: POR, WDT
• Number Of I /o: 30
• Program Memory Type: ROMless
• Eeprom Size: 512 x 8
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 4.75 V ~ 5.25 V
• Data Converters: A/D 8x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Program Memory Size: -

7.7 Status Flags and Interrupts
7-10
The SCI transmitter has two status flags. These status flags can be read by software
(polled) to tell when the corresponding condition exists. Alternatively, a local interrupt
enable bit can be set to enable each of these status conditions to generate interrupt
requests when the corresponding condition is present. Status flags are automatically
set by hardware logic conditions, but must be cleared by software, which provides an
interlock mechanism that enables logic to know when software has noticed the status
indication. The software clearing sequence for these flags is automatic — functions
that are normally performed in response to the status flags also satisfy the conditions
of the clearing sequence.
EXTAL
XTAL
Figure 7-3 SCI Baud Rate Generator Block Diagram
CLOCK GENERATOR
OSCILLATOR
AND
( 4)
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AS
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2
2
2
2
2
2
2
0:0
SCR2:SCR1:SCR0
0:0:0
0:0:1
0:1:0
0:1:1
1:0:0
1:0:1
1:1:0
1:1:1
3
0:1
4
1:0
BAUD RATE
BAUD RATE
TRANSMIT
RECEIVE
(16X)
(1X)
SCI
SCI
13
16
SCP1:SCP0
1:1
TECHNICAL DATA
MC68HC11F1
INTERNAL
BUS
CLOCK
(PH2)