MC68HC908JK8CP Freescale Semiconductor, MC68HC908JK8CP Datasheet - Page 137
MC68HC908JK8CP
Manufacturer Part Number
MC68HC908JK8CP
Description
Manufacturer
Freescale Semiconductor
Datasheet
1.MC68HC908JK8CP.pdf
(212 pages)
Specifications of MC68HC908JK8CP
Cpu Family
HC08
Device Core Size
8b
Frequency (max)
8MHz
Interface Type
SCI
Program Memory Type
Flash
Program Memory Size
8KB
Total Internal Ram Size
256Byte
# I/os (max)
15
Number Of Timers - General Purpose
4
Operating Supply Voltage (typ)
3.3/5V
Operating Supply Voltage (max)
5.5V
Operating Supply Voltage (min)
2.7V
On-chip Adc
13-chx8-bit
Instruction Set Architecture
CISC
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Through Hole
Pin Count
20
Package Type
PDIP
Lead Free Status / Rohs Status
Not Compliant
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TE — Transmitter Enable Bit
RE — Receiver Enable Bit
RWU — Receiver Wakeup Bit
SBK — Send Break Bit
Freescale Semiconductor
Setting this read/write bit begins the transmission by sending a preamble of 10 or 11 logic 1s from the
transmit shift register to the TxD pin. If software clears the TE bit, the transmitter completes any
transmission in progress before the TxD returns to the idle condition (logic 1). Clearing and then setting
TE during a transmission queues an idle character to be sent after the character currently being
transmitted. Reset clears the TE bit.
Setting this read/write bit enables the receiver. Clearing the RE bit disables the receiver but does not
affect receiver interrupt flag bits. Reset clears the RE bit.
This read/write bit puts the receiver in a standby state during which receiver interrupts are disabled.
The WAKE bit in SCC1 determines whether an idle input or an address mark brings the receiver out
of the standby state and clears the RWU bit. Reset clears the RWU bit.
Setting and then clearing this read/write bit transmits a break character followed by a logic 1. The logic
1 after the break character guarantees recognition of a valid start bit. If SBK remains set, the
transmitter continuously transmits break characters with no logic 1s between them. Reset clears the
SBK bit.
1 = Transmitter enabled
0 = Transmitter disabled
1 = Receiver enabled
0 = Receiver disabled
1 = Standby state
0 = Normal operation
1 = Transmit break characters
0 = No break characters being transmitted
Writing to the TE bit is not allowed when the enable SCI bit (ENSCI) is clear.
ENSCI is in SCI control register 1.
Writing to the RE bit is not allowed when the enable SCI bit (ENSCI) is
clear. ENSCI is in SCI control register 1.
Do not toggle the SBK bit immediately after setting the SCTE bit. Toggling
SBK before the preamble begins causes the SCI to send a break character
instead of a preamble.
MC68HC908JL8/JK8 • MC68HC08JL8/JK8 • MC68HC908KL8 Data Sheet, Rev. 3.1
NOTE
NOTE
NOTE
I/O Registers
137
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