MC68000 MOTOROLA [Motorola, Inc], MC68000 Datasheet - Page 256
MC68000
Manufacturer Part Number
MC68000
Description
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet
1.MC68000.pdf
(480 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MC68000-10/BZAJC
Manufacturer:
MOT
Quantity:
26
Company:
Part Number:
MC68000-8BXAJ
Manufacturer:
MOT
Quantity:
9
Company:
Part Number:
MC680008FN8
Manufacturer:
FREESCALE
Quantity:
8 831
Company:
Part Number:
MC68000FN10
Manufacturer:
MOT
Quantity:
5 510
Part Number:
MC68000FN10
Manufacturer:
MOTOROLA/摩托罗拉
Quantity:
20 000
Company:
Part Number:
MC68000FN12
Manufacturer:
MOT
Quantity:
5 510
Part Number:
MC68000L8
Manufacturer:
MOTOROLA/摩托罗拉
Quantity:
20 000
Part Number:
MC68000P10
Manufacturer:
MOT
Quantity:
20 000
- Current page: 256 of 480
- Download datasheet (2Mb)
Communications Processor (CP)
4.6.1 SCP Programming Model
The SCP mode register consists of the upper eight bits of SPMODE. The SCP mode regis-
ter, an internal read-write register that controls both the SCP operation mode and clock
source, is cleared by reset.
STR—Start Transmit
LOOP—Loop Mode
CI—Clock Invert
PM3–PM0—Prescale Modulus Select
The prescale modulus select bits specify the divide ratio of the prescale divider in the SCP
clock generator. The divider value is 4*(“PM3–PM0” + 1) giving a clock divide ratio of 4 to
64 in multiples of 4. With a 16.384-MHz system clock, the maximum SCP clock is 4.096
MHz.
EN—Enable SCP
4-136
When set, this bit causes the SCP controller to transmit eight bits from the SCP transmit/
receive buffer descriptor (BD) and to receive eight bits of data in this same BD. This bit is
cleared automatically after one system clock cycle.
When set, the loop mode bit selects local loopback operation. The ones complement of
the transmitter output is internally connected to the receiver input; the receiver and trans-
mitter operate normally except that SPRXD is ignored. When cleared, this bit selects nor-
mal operation.
When set, the CI bit inverts the SCP clock polarity. When CI is zero, transmitted data bits
shift on rising clock edges, and received bits are sampled on falling edges. When the SCP
is idle, the clock is low. While CI is one, transmitted data bits are shifted on falling edges,
and received bits are sampled on rising edges. In this case, when the SCP is idle, the
clock is high.
When set, this bit enables the SCP operation and connects the external pins SPRXD/
CTS3, SPTXD/RTS3, and SPCLK/CD3 internally to the SCP (see Figure 4-45). When
cleared, the SCP is put into a reset state consuming minimal power, and the three pins
are connected back to SCC3.
When the DIAG1–DIAG0 bits of SCC3 are programmed to nor-
mal operation control of the CTS and CD lines and the ENT or
ENR bits of SCC3 are set, the user may not modify the EN bit.
STR
15
LOOP
14
MC68302 USER’S MANUAL
13
CI
PM3
12
NOTE
PM2
11
PM1
10
PM0
9
EN
8
MOTOROLA
Related parts for MC68000
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Motorola, Inc [VOLTAGE REGULATOR]
Manufacturer:
Motorola
Datasheet:
Part Number:
Description:
6367254 MOTOROLA SC (XSTRS/R F)
Manufacturer:
MOTOROLA [Motorola, Inc]
Datasheet:
Part Number:
Description:
MC1494LMotorola, Inc [MONOLITHIC FOUR-QUADRANT MULTIPLIER]
Manufacturer:
Motorola
Datasheet:
Part Number:
Description:
MC1466LMotorola, Inc [PRECISION WIDE RANGE VOLTAGE AND CURRENT REGULATOR]
Manufacturer:
Motorola
Datasheet:
Part Number:
Description:
MC145532DWMotorola, Inc [ADPCM Transcoder]
Manufacturer:
Motorola
Datasheet:
Part Number:
Description:
Silicon Controlled Rectifiers
Manufacturer:
MOTOROLA [Motorola, Inc]
Datasheet:
Part Number:
Description:
RF Power Field Effect Transistors N-Channel Enhancement-Mode Lateral MOSFETs
Manufacturer:
MOTOROLA [Motorola, Inc]
Datasheet:
Part Number:
Description:
RF POWER FIELD EFFECT TRANSISTORS
Manufacturer:
MOTOROLA [Motorola, Inc]
Datasheet:
Part Number:
Description:
LATERAL N-CHANNEL BROADBAND RF POWER MOSFETs
Manufacturer:
MOTOROLA [Motorola, Inc]
Datasheet:
Part Number:
Description:
RF POWER FIELD EFFECT TRANSISTOR
Manufacturer:
MOTOROLA [Motorola, Inc]
Datasheet:
Part Number:
Description:
RF LOW POWER TRANSISTOR NPN SILICON
Manufacturer:
MOTOROLA [Motorola, Inc]
Datasheet:
Part Number:
Description:
PLASTIC SURFACE MOUNT ZENER DIODES 1.5 WATTS 3.3-68 VOLTS
Manufacturer:
MOTOROLA [Motorola, Inc]
Datasheet:
Part Number:
Description:
OVERVOLTAGE TRANSIENT SUPPRESSOR
Manufacturer:
MOTOROLA [Motorola, Inc]
Datasheet:
Part Number:
Description:
TMOS POWER FET 15 AMPERES 60 VOLTS
Manufacturer:
MOTOROLA [Motorola, Inc]
Datasheet:
Part Number:
Description:
TMOS POWER FET LOGIC LEVEL 19 AMPERES 30 VOLTS RDS(on) = 0.099 OHM
Manufacturer:
MOTOROLA [Motorola, Inc]
Datasheet: