p2125vps20 Renesas Electronics Corporation., p2125vps20 Datasheet - Page 154

• Manufacturer Part Number: p2125vps20
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Section 6 Bus Controller (BSC)
6.5.3
(1)
Figure 6.5 shows the bus timing for an 8-bit, 2-state access space. When an 8-bit access space is
accessed, the upper half (D15 to D8) of the data bus is used. Wait states cannot be inserted. This
LSI does not have the lower data bus (D7 to D0) and LWR pin. The pins for the upper data bus
(D15 to D8) in this LSI are D7 to D0 and the pin for the HWR signal is WR.
Rev. 1.00 Sep. 21, 2006 Page 116 of 658
REJ09B0310-0100
8-Bit, 2-State Access Space
Basic Operation Timing
Read
Write
AS/IOS (IOSE = 1)
AS/IOS (IOSE = 0)
Figure 6.5 Bus Timing for 8-Bit, 2-State Access Space
Address bus
D15 to D8
D15 to D8
D7 to D0
φ
HWR
RD
T
1
Bus cycle
Valid
T
2
Invalid
Valid