Datasheet

Rev.6.00 Oct.28.2004 page 16 of 1016
REJ09B0138-0600H
Pin No.
Type Symbol TFP-120 FP-128B I/O Name and Function
Operating mode
control
MD
2
to
MD
0
115 to
113
125 to
123
Input Mode pins: These pins set the
operating mode.
The relation between the settings of
pins MD
2
to MD
0
and the operating
mode is shown below. These pins
should not be changed while the
H8S/2357 Group is operating.
MD
2
MD
1
MD
0
Operating
Mode
000—
1—
10—
1—
1 0 0 Mode 4*
1 Mode 5*
1 0 Mode 6
1 Mode 7
Note: * In ROMless version, only
modes 4 and 5 are available.
System control RES 73 81 Input Reset input: When this pin is driven
low, the chip is reset. The type of
reset can be selected according to
the NMI input level. At power-on, the
NMI pin input level should be set
high.
STBY 75 83 Input Standby: When this pin is driven low,
a transition is made to hardware
standby mode.
BREQ 88 96 Input Bus request: Used by an external
bus master to issue a bus request to
the H8S/2357 Group.
BREQO 86 94 Output Bus request output: The external
bus request signal used when an
internal bus master accesses
external space in the external bus-
released state.
BACK 87 95 Output Bus request acknowledge:
Indicates that the bus has been
released to an external bus master.
FWE*
2
72 80 Input Flash write enable:
Enables/disables flash memory
programming.
Interrupts NMI 74 82 Input Nonmaskable interrupt: Requests a
nonmaskable interrupt. When this pin
is not used, it should be fixed high.
IRQ7 to
IRQ0
32 to 29,
28 to 25
38, 37,
34, 33,
32 to 29
Input Interrupt request 7 to 0: These pins
request a maskable interrupt.