MC68HC711P2CFN4 Freescale Semiconductor, MC68HC711P2CFN4 Datasheet - Page 111

• Manufacturer Part Number: MC68HC711P2CFN4
• Description: IC MCU 32K OTP 4MHZ 84-PLCC
• Manufacturer: Freescale Semiconductor
• Series: HC11r

Specifications of MC68HC711P2CFN4

• Core Processor: HC11
• Core Size: 8-Bit
• Speed: 4MHz
• Connectivity: MI Bus, SCI, SPI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 50
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: OTP
• Eeprom Size: 640 x 8
• Ram Size: 1K 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: 84-PLCC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

6.3 Push-pull sequence
MC68HC11P2 — Rev 1.0
TXD pin (true data)
Push-pull function
MI BUS wire
Time slots
Bit fields
Start
Communication between the MCU and the slave device always utilizes
the same frame organization. First, the MCU sends serial data to the
selected device. This data field is called the ‘push field’. At the end of the
push field, the selected device automatically sends back to the MCU the
data held during the push sequence. The MCU reads the serial data sent
by the selected device. This data is called the ‘pull field’ and contains
status information followed by the end-of-frame information from the
selected device.
Freescale Semiconductor, Inc.
Push
sync D0 D1 D2 D3 D4 A0 A1 A2
1 0
For More Information On This Product,
Motorola Interconnect Bus (MI BUS)
Figure 6-1. MI BUS timing
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(driven by MCU)
Push (biphase coded)
Data
Push field
Message frame
Address
Start
sync
Pull
0 1
0
1
Motorola Interconnect Bus (MI BUS)
Data
NRZ
Pull (NRZ coded)
(driven by slave)
2 3 4
Pull field
End of frame
5
Stop
6 7
Push-pull sequence
Technical Data