MMC2114 MOTOROLA [Motorola, Inc], MMC2114 Datasheet - Page 530
MMC2114
Manufacturer Part Number
MMC2114
Description
M CORE Microcontrollers
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet
1.MMC2114.pdf
(654 pages)
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External Bus Interface Module (EBI)
20.3.1 Data Bus (D[31:0])
20.3.2 Show Cycle Strobe (SHS)
20.3.3 Transfer Acknowledge (TA)
20.3.4 Transfer Error Acknowledge (TEA)
20.3.5 Emulation Mode Chip Selects (CSE[1:0])
Advance Information
530
The three-state bidirectional data bus (D[31:0]) signals are the
general-purpose data path between the microcontroller unit (MCU) and
all other devices.
In master and emulation modes, show cycle strobe (SHS) is the strobe
for capturing address, controls, and data during show cycles. In master
mode this default functionality can be overridden to make the pin
function as digital I/O. See
and
mode, the SHS pin is configured as digital I/O (PE7) by default.
The transfer acknowledge (TA) signal indicates that the external data
transfer is complete. During a read cycle, when the processor
recognizes TA, it latches the data and then terminates the bus cycle.
During a write cycle, when the processor recognizes TA, the bus cycle
is terminated. TA is an input in master and emulation modes. In
single-chip mode, the TA pin is configured as digital I/O (PE6) by default.
The transfer error acknowledge (TEA) indicates an error condition exists
for the bus transfer. The bus cycle is terminated and the CPU begins
execution of the access error exception. TEA is an input in master and
emulation modes. In single-chip mode the TEA pin is configured a digital
I/O (PE5) by default.
The emulation mode chip select (CSE[1:0]) output signals provide
information for development support. In single-chip mode and master
mode, these pins are configured as digital I/O (PE4 and PE3) by default.
Freescale Semiconductor, Inc.
Table 12-3. Ports A–I Supported Pin
For More Information On This Product,
External Bus Interface Module (EBI)
Go to: www.freescale.com
12.4.2.6 Port E Pin Assignment Register
MMC2114 • MMC2113 • MMC2112 — Rev. 1.0
Functions. In single-chip
MOTOROLA
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