HD6412320 RENESAS [Renesas Technology Corp], HD6412320 Datasheet - Page 241

• Manufacturer Part Number: HD6412320
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family H8S-2300 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

If a refresh request * and external bus release request occur simultaneously, the order of priority is
as follows:
As a refresh * and an external access by an internal bus master can be executed simultaneously,
there is no relative order of priority for these two operations.
Note: * The DRAM interface is not supported in the H8S/2321.
6.10.3
Table 6.9 shows the pin states in the external bus released state.
Table 6.9
Pins
A
D
CSn *
CAS *
AS
RD
HWR
LWR
DACKm *
Notes: 1. n = 0 to 7
23
15
to A
to D
1
3
0
0
2. m = 0 or 1
3. The CAS and DACKm pin functions are not supported in the H8S/2321.
2
Pin States in External Bus Released State
*
3
Pin States in Bus Released State
(High) Refresh * > External bus release (Low)
Pin State
High impedance
High impedance
High impedance
High impedance
High impedance
High impedance
High impedance
High impedance
High
Rev.6.00 Sep. 27, 2007 Page 211 of 1268
Section 6 Bus Controller
REJ09B0220-0600