h8s-2138 Renesas Electronics Corporation., h8s-2138 Datasheet - Page 593
h8s-2138
Manufacturer Part Number
h8s-2138
Description
Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2138.pdf
(1061 pages)
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Table 17.8 Fast A20 Gate Output Signals
Notes: 1. Arbitrary data with bit 1 set to 1.
17.3.4
Host interface output can be placed in the high-impedance state according to the state of the
HIFSD pin. Setting the SDE bit to 1 in the SYSCR2 register enables the HIFSD pin is slave mode.
The HIF constantly monitors the HIFSD pin, and when this pin goes low, places the host interface
output pins (HIRQ1, HIRQ11, HIRQ12, and GA20) in the high-impedance state. At the same
time, the host interface input pins (CS1, CS2 or ECS2, IOW, IOR, and HA0) are disabled (fixed at
the high input state internally) regardless of the pin states, and the signals of the multiplexed
HA0
1
0
1
1
0
1
1
0
1/0
1
0
1/0
1
1
1
1
1
0
1
2. Arbitrary data with bit 1 cleared to 0.
Data/Command
H'D1 command
1 data *
H'FF command
H'D1 command
0 data *
H'FF command
H'D1 command
1 data *
Command other than H'FF
and H'D1
H'D1 command
0 data *
Command other than H'FF
and H'D1
H'D1 command
Command other than H'D1
H'D1 command
H'D1 command
H'D1 command
Any data
H'D1 command
Host Interface Pin Shutdown Function
1
2
1
2
Internal CPU
Interrupt Flag (IBF)
0
0
0
0
0
0
0
0
1
0
0
1
0
1
0
0
0
0
0
Section 17 Host Interface [H8S/2138 Group]
Rev. 4.00 Jun 06, 2006 page 539 of 1004
GA20
(P81)
Q
1
Q (1)
Q
0
Q (0)
Q
1
Q (1)
Q
0
Q (0)
Q
Q
Q
Q
Q
1/0
Q(1/0)
Remarks
Turn-on sequence
Turn-off sequence
Turn-on sequence
(abbreviated form)
Turn-off sequence
(abbreviated form)
Cancelled sequence
Retriggered sequence
Consecutively executed
sequences
REJ09B0301-0400
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