mcf5272 Freescale Semiconductor, Inc, mcf5272 Datasheet - Page 211

• Manufacturer Part Number: mcf5272
• Description: Mcf5272 Coldfire Integrated Microprocessor User
• Manufacturer: Freescale Semiconductor, Inc

MOTOROLA
SDADR[13:0]
10_PRECHG
Figure 9-10 shows a similar burst read that hits the page. As in the page-miss example, the
SDRAM controller takes a clock cycle (T2) to determine whether the access is a hit or a
miss. Because it is a hit, the burst operation follows immediately.
SDBA[1:0]
SDCLKE
SDCLK
BS[3:0]
D[31:0]
SDWE
SDCS
Figure 9-9. SDRAM Burst Read, 32-Bit Port, Page Miss, Access = 9-1-1-1
RAS0
CAS0
T0
CF2 Core
Address
T1
Issue
T2
Miss?
Page
Hit or
Precharge
Old Page
T3
Bank x
Chapter 9. SDRAM Controller
T4
New Page
Activate
T5
Bank y
Row
Row
T6
T7
Read
(7)
CASL = 2
Col
1
T8
Bank y
Read
Col
2
T9
Read
Data
Col
3
T10
Read
Data
Col
4
SDRAM Interface
T11
Data
T12
Data
9-17
T13