MC68302EH16C Freescale Semiconductor, MC68302EH16C Datasheet - Page 95

• Manufacturer Part Number: MC68302EH16C
• Description: IC MPU MULTI-PROTOCOL 132-PQFP
• Manufacturer: Freescale Semiconductor

Specifications of MC68302EH16C

• Processor Type: M683xx 32-Bit
• Speed: 16MHz
• Voltage: 5V
• Mounting Type: Surface Mount
• Package / Case: 132-MQFP, 132-PQFP
• Controller Family/series: 68K
• Core Size: 32 Bit
• Ram Memory Size: 1152Byte
• Cpu Speed: 16MHz
• No. Of Timers: 3
• Embedded Interface Type: SCP, TDM
• Digital Ic Case Style: PQFP
• Rohs Compliant: Yes
• Family Name: M68000
• Device Core: ColdFire
• Device Core Size: 32b
• Frequency (max): 16MHz
• Instruction Set Architecture: RISC
• Supply Voltage 1 (typ): 5V
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 132
• Package Type: PQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

A special case occurs when the locked read-modify-write test and set (TAS) instruction is
executed in combination with the chip selects. The assertion of wait states on the write por-
tion of the cycle will only occur if the RMCST bit in the SCR is set. Refer to 3.8.3 System
Control Bits for more details.
3.6.1 Chip-Select Logic Key Features
Key features of the chip-select logic are as follows:
3.6.2 Chip-Select Registers
Each of the four chip-select units has two registers that define its specific operation. These
registers are a 16-bit base register (BR) and a 16-bit option register (OR) (e.g., BR0 and
OR0). These registers may be modified by the M68000 core. The BR should normally be
programmed after the OR since the BR contains the chip-select enable bit.
3.6.2.1 Base Register (BR3–BR0)
These 16-bit registers consist of a base address field, a read-write bit, and a function code
field.
FC2–FC0 —Function Code Field
MOTOROLA
• Four Programmable Chip-Select Lines
• Various Block Sizes: 8K, 16K, 32K, 64K, 128K, 256K, 512K, 1M, 2M, 4M, 8M, and 16M
• Read-Only, Write-Only, or Read-Write Select
• Internal DTACK Generation with Wait-State Options
• Default Line (CS0) to Select an 8K-Boot ROM Containing the Reset Vector and Initial
This field is contained in bits 15–13 of each BR. These bits are used to set the address
space function code. The address compare logic uses these bits to determine whether an
15
Bytes
Program
FC2 –FC0
SCR), will not activate the chip-select lines. Thus, it is conve-
nient to use one of the chip-select lines to select external ROM/
RAM that overlaps these register addresses, since, in this way,
bus contention is completely avoided during a read access to
these addresses. If, in a given application, it is not possible to
use the chip-select lines for this purpose, the IAC signal may be
used externally to prevent bus contention.
The chip-select logic does not allow an address match during in-
terrupt acknowledge cycles.
13
12
MC68302 USER’S MANUAL
BASE ADDRESS (A23–A13)
NOTE
System Integration Block (SIB)
2
RW
1
3-45
EN
0