MC68EC000EI20 Freescale Semiconductor, MC68EC000EI20 Datasheet - Page 4

• Manufacturer Part Number: MC68EC000EI20
• Description: IC MPU 32BIT 20MHZ 68-PLCC
• Manufacturer: Freescale Semiconductor

Specifications of MC68EC000EI20

• Processor Type: M680x0 32-Bit
• Speed: 20MHz
• Voltage: 3.3V, 5V
• Mounting Type: Surface Mount
• Package / Case: 68-PLCC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -

4
2.0 SIGNAL DESCRIPTION
Change Figure 3-3 on Page 3-2.
2.1 Data Bus (D15-D0)
In Section 3.2 on page 3-4, replace “The MC68EC000 and MC68HC001 use D7-D0 in 8-bit mode, and D15-
D8 are undefined.” with “Using the MC68HC001, MC68EC000, and MC68SEC000 mode pin, you can
statically select either 8- or 16-bit modes for data transfer. The MC68EC000, MC68SEC000, and
MC68HC001 use D7-D0 in 8-bit mode. D15-D8 are undefined.”
2.2 Bus Arbitration Control
In Section 3.4 on page 3-5, the sentence “In the 48-pin version of the MC68008 and MC68EC000, no pin is
available for the bus grant acknowledge signal; this microprocessor uses a two-wire bus arbitration
scheme.” should read “In the 64-pin MC68EC000 and MC68SEC000, no pin is available for the bus grant
acknowledge signal. These microprocessors use a two-wire bus arbitration scheme.”
2.3 System Control
The Mode subsection heading of Section 3.6 on page 3-7 should read ‘‘Mode (MODE) (MC68HC001/
68EC000/68SEC000).’’
2.4 MC68SEC000 Low-Power Mode
Add the following to Sections 4 and 5, Bus Operation.
The MC68SEC000 has been redesigned to provide fully static- and low-power operation. This section
describes the recommended method for placing the MC68SEC000 into a low-power mode to reduce the
Figure 1. Input and Output Signals (MC68EC000 and MC68SEC000)
PROCESSOR
STATUS
SYSTEM
CONTROL
Freescale Semiconductor, Inc.
For More Information On This Product,
M68000 USER’S MANUAL ADDENDUM
GND
RESET
BERR
MODE
V
CLK
HALT
CC
FC1
FC2
FC0
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MC68SEC000
A23-A0
D15-D0
AS
R/W
UDS
LDS
DTACK
IPL0
BR
IPL1
AVEC
BG
IPL2
ADDRESS BUS
DATA BUS
ASYNCHRONOUS
BUS CONTROL
BUS ARBITRATION
CONTROL
INTERRUPT
CONTROL
MOTOROLA