YLCDRSK2378 Renesas Electronics America, YLCDRSK2378 Datasheet - Page 320

• Manufacturer Part Number: YLCDRSK2378
• Description: KIT DEV EVAL H8S/2378 LCD
• Manufacturer: Renesas Electronics America
• Series: H8®r

Specifications of YLCDRSK2378

• Main Purpose: Displays, LCD Controller
• Embedded: Yes, MCU, 16-Bit
• Utilized Ic / Part: YLCDRSK2378
• Primary Attributes: 5.7" QVGA, Touch Screen
• Secondary Attributes: Source Code on CD, Debugging Requires Emulator Cable E10A USB/JTAG
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Section 6 Bus Controller (BSC)
Relationship between Chip Select (CS) Signal and Read (RD) Signal: Depending on the
system’s load conditions, the RD signal may lag behind the CS signal. An example is shown in
figure 6.68. In this case, with the setting for no idle cycle insertion (a), there may be a period of
overlap between the bus cycle A RD signal and the bus cycle B CS signal. Setting idle cycle
insertion, as in (b), however, will prevent any overlap between the RD and CS signals. In the
initial state after reset release, idle cycle insertion (b) is set.
Rev.7.00 Mar. 18, 2009 page 252 of 1136
REJ09B0109-0700
Address bus
CS (area A)
CS (area B)
Figure 6.68 Relationship between Chip Select (CS) and Read (RD)
RD
Overlap period between CS (area B)
and RD may occur
φ
(a) No idle cycle insertion
T
(ICIS1 = 0)
1
Bus cycle A
T
2
T
3
Bus cycle B
T
1
T
2
Address bus
CS (area A)
CS (area B)
RD
φ
T
(b) Idle cycle insertion
1
Bus cycle A
(ICIS1 = 1, initial value)
T
2
T
3
Idle cycle
T
i
Bus cycle B
T
1
T
2