upd70f3017ay Renesas Electronics Corporation., upd70f3017ay Datasheet - Page 98

• Manufacturer Part Number: upd70f3017ay
• Description: V850/sa1tm 32-/16-bit Single-chip Microcontroller
• Manufacturer: Renesas Electronics Corporation.

4.8 Bus Timing
register (SYC)).
98
The V850/SA1 can execute read/write control for an external device using the following two modes.
• Mode using DSTB, R/W, LBEN, UBEN, and ASTB signals
• Mode using RD, WRL, WRH, and ASTB signals
Set these modes by using the BIC bit of the system control register (SYC) (refer to 4.2.2 (1) System control
Remarks 1.
2. The broken line indicates the high-impedance state.
UBEN, LBEN (output)
indicates the sampling timing when the number of programmable waits is set to 0.
WRH, WRL (output)
A16 to A21 (output)
DSTB, RD (output)
A1 to A15 (output)
CLKOUT (output)
ASTB (output)
AD0 to AD15
R/W (output)
WAIT (input)
(I/O)
CHAPTER 4 BUS CONTROL FUNCTION
Figure 4-8. Memory Read (1/4)
User’s Manual U12768EJ4V1UD
H
Address
T1
(a) 0 waits
Address
Address
T2
Data
T3