YR0K42378FC000BA Renesas Electronics America, YR0K42378FC000BA Datasheet - Page 296

• Manufacturer Part Number: YR0K42378FC000BA
• Description: KIT EVAL FOR H8S/2378
• Manufacturer: Renesas Electronics America
• Series: H8®r
• Type: MCUr

Specifications of YR0K42378FC000BA

• Contents: Board
• For Use With/related Products: H8S/2378
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Section 6 Bus Controller (BSC)
6.7.11
When synchronous DRAM with a ×16-bit configuration is connected, DQMU and DQML are
used for the control signals needed for byte access.
Figures 6.49 and 6.50 show the control timing for DQM, and figure 6.51 shows an example of
connection of byte control by DQMU and DQML.
Rev.7.00 Mar. 18, 2009 page 228 of 1136
REJ09B0109-0700
Upper data bus
Lower data bus
Precharge-sel
Address bus
Byte Access Control
SDRAMφ
DQMU
DQML
CKE
RAS
CAS
WE
φ
(Upper Byte Write Access: SDWCD = 0, CAS Latency 2)
Figure 6.49 DQMU and DQML Control Timing
Column address
PALL
T
p
Row address
Row address
ACTV
T
r
High
High
NOP
T
c1
High impedance
Column address
WRIT
T
cl
NOP
T
c2