HD6432351 Datasheet, PDF (34/989 Pages) Renesas Technology Corp – The H8S/2000 CPU has an internal 32-bit architecture, is provided with sixteen 16-bit general registers and a concise

Table 1-3 Pin Functions (cont)
Type
Symbol
Operating mode MD₂ to
control
MD₀
System control RES
STBY
BREQ
BREQO
BACK
Pin No.
TFP-120 FP-128
115 to
113
125 to
123
73
81
75
83
88
96
86
94
87
95
I/O Name and Function
Input
Mode pins: These pins set the
operating mode.
The relation between the settings of
pins MD₂ to MD₀ and the operating
mode is shown below. These pins
should not be changed while the
H8S/2350 Series is operating.
Operating
MD2 MD1 MD0 Mode
0
0
0
—
1
Mode 1
1
0
Mode 2*
1
Mode 3*
1
0
0
Mode 4
1
Mode 5
1
0
Mode 6*
1
Mode 7*
Note: * Only applies to the H8S/2351.
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.
Input
Standby: When this pin is driven low,
a transition is made to hardware
standby mode.
Input
Bus request: Used by an external bus
master to issue a bus request to the
H8S/2350 Series.
Output
Bus request output: The external bus
request signal used when an internal
bus master accesses external space
in the external bus-released state.
Output Bus request acknowledge: Indicates
that the bus has been released to an
external bus master.
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