MC68306 Motorola, MC68306 Datasheet - Page 23

• Manufacturer Part Number: MC68306
• Description: Integrated EC000 Processor
• Manufacturer: Motorola

NOTES:
1. Pullup may be required, value depends on individual application. Must not be left floating.
MOTOROLA
Address Signals
Address Strobe
Bus Error
Bus Grant
Bus Grant Acknowledge
Bus Request
Data Bus
Data Transfer Acknowledge
DRAM Multiplexed Address14–0
Function Codes
Halt
Lower Data Strobe
Upper Data Strobe
Lower-Byte Write Strobe
Upper-Byte Write Strobe
Output Enable
Read/Write
Reset
Chip Select
Chip Select 4–7/Address Port 23 –
20
Column Address Strobe
Row Address Strobe
DRAM Write Signal
Signal Name
Signal Name
Signal Name
Table 2-3. DRAM Controller Signal Summary
Table 2-2. Chip Select Signal Summary
Table 2-1. Bus Signal Summary
DRAMA14–DRAMA0
CS7–CS4/ A23–A20
CAS1–CAS0
RAS1–RAS0
Mnemonic
Mnemonic
Mnemonic
FC2–FC0
CS3–CS0
MC68306 USER'S MANUAL
D15–D0
DRAMW
A23–A1
BGACK
DTACK
RESET
BERR
HALT
UDS
LDS
R/ W
UW
BG
LW
OE
AS
BR
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Input/
Input/
Input/
Input
Input
I/O
I/O
I/O
I/O
I/O
I/O
I/O
Three-State During
Three-State During
Three-State During
Bus Arbitration
Bus Arbitration
Bus Arbitration
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
—
—
—
—
—
—
Pullup Required
Pullup Required
Pullup Required
4.7 K
2.2 K
2.2 K
2.2 K
4.7 K
4.7 K
2.2 K
4.7 K
4.7 K
4.7 K
4.7 K
(1)
(1)
2- 3