MC68340AG16E Freescale Semiconductor, MC68340AG16E Datasheet - Page 62
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MC68340AG16E
Manufacturer Part Number
MC68340AG16E
Description
IC MPU 32BIT 16MHZ 144-LQFP
Manufacturer
Freescale Semiconductor
Datasheet
1.MC68340FE25E.pdf
(441 pages)
Specifications of MC68340AG16E
Processor Type
M683xx 32-Bit
Speed
16MHz
Voltage
5V
Mounting Type
Surface Mount
Package / Case
144-LQFP
Controller Family/series
68K
Core Size
32 Bit
No. Of I/o's
16
Cpu Speed
16MHz
No. Of Timers
2
Embedded Interface Type
UART
Digital Ic Case Style
LQFP
Rohs Compliant
Yes
Processor Series
M683xx
Core
CPU32
Maximum Clock Frequency
16 MHz
Maximum Operating Temperature
+ 105 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
0 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
-
Lead Free Status / Rohs Status
Details
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The MC68340 drives the address bus with the desired address and drives the SIZx pins to
indicate a long-word operand. For a read operation, the slave responds by placing the two
most significant bytes of the operand on bits 15–0 of the data bus and asserting DSACK1
to indicate a 16-bit port. The MC68340 reads the two most significant bytes of the operand
(bytes 0 and 1) from bits 15–0. The MC68340 then decrements the transfer size counter
by 2, increments the address by 2, initiates a new cycle, and reads bytes 2 and 3 of the
operand from bits 15–0 of the data bus.
For a write operation, the MC68340 drives the two most significant bytes of the operand
on bits 15–0 of the data bus. The slave device then reads the two most significant bytes of
the operand (bytes 0 and 1) from bits 15–0 of the data bus and asserts DSACK1 to
indicate reception and a 16-bit port. The MC68340 then decrements the transfer size
counter by 2, increments the address by 2, and writes bytes 2 and 3 of the operand to bits
15–0 of the data bus.
MOTOROLA
FC3–FC0
CLKOUT
DSACK0
DSACK1
A31–A0
D15–D8
D7–D0
SIZ0
SIZ1
R/W
AS
DS
Figure 3-5. Long-Word and Word Read and Write Timing—16-Bit Port
S0
4 BYTES
S2
LONG WORD READ
FROM 16-BIT BUS
OP0
S4
OP1
S0
Freescale Semiconductor, Inc.
For More Information On This Product,
2 BYTES
S2
OP2
OP3
S4
MC68340 USER’S MANUAL
Go to: www.freescale.com
FROM 16-BIT BUS
S0
WORD READ
2 BYTES
S2
OP0
OP1
S4
S0
LONG WORD WRITE TO
4 BYTES
S2
OP0
OP1
16-BIT BUS
S4
S0
S2
2 BYTES
OP2
OP3
S4
S0
WRITE TO
16-BIT BUS
WORD
S2
2 BYTES
OP1
OP0
S4
3- 13
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