r8a77850anbg Renesas Electronics Corporation., r8a77850anbg Datasheet - Page 400

• Manufacturer Part Number: r8a77850anbg
• Description: Renesas 32-bit Risc Microcomputer Superh? Risc Engine Family
• Manufacturer: Renesas Electronics Corporation.

11. Local Bus State Controller (LBSC)
When asynchronous input is set (ASYNCn = 1), the sampling timing is one cycle before the
synchronous input setting (see figure 11.4).
The timing shown in this section, other sections and section 32 Electrical Characteristics is that
with synchronous input setting (ASYNCn = 0). Note that the setup/hold time must be satisfied
when synchronous input is set.
Rev.1.00 Jan. 10, 2008 Page 370 of 1658
REJ09B0261-0100
Bit
6 to 0
Bit Name
ASYNC[6:0] All 0
CLKOUT
RDY
(BCR.ASYNC0 = 0)
RDY
(BCR.ASYNC0 = 1)
: Sampling Timing
Figure 11.4 RDY Sampling Timings with ASYNCn Settings
Initial
Value
T1
(Two Wait Cycles Inserted by CSnWCR.)
R/W
R/W
Tw
Description
Asynchronous Input
These bits enable asynchronous inputs of the
corresponding pins.
0: CLKOUT-synchronous inputs to the corresponding
1: CLKOUT-asynchronous inputs to the corresponding
ASYNC[6]: DREQ3
ASYNC[5]: DREQ2
ASYNC[4]: DREQ1
ASYNC[3]: DREQ0
ASYNC[2]: IOIS16
ASYNC[1]: BREQ
ASYNC[0]: RDY
pins
pins
Tw
Twe
T2