Section 1
Overview
Rev. 1.00 Mar. 12, 2008 Page 13 of 1178
REJ09B0403-0100
1.3.3 Pin
Functions
Table 1.2
Pin Functions
Pin No.
Type
Symbol
176-Pin 144-Pin I/O Name
and
Function
VCC A1,
N2,
P9, K12,
A11, C5
1, 36, 86,
120
Input
Power supply pins. Connect all these pins
to the system power supply. Connect the
bypass capacitor between VCC and VSS
(near VCC).
VCL
F3
13
Input
External capacitance pin for internal step-
down power. Connect this pin to Vss
through an external capacitor (that is
located near this pin) to stabilize internal
step-down power.
Power
supply
VSS D2,
M5,
F13, C13,
A3
7, 42, 94,
110, 141
Input
Ground pins. Connect all these pins to the
system power supply (0V).
XTAL A2
143
Input
EXTAL B2 144 Input
For connection to a crystal resonator. An
external clock can be supplied from the
EXTAL pin. For an example of crystal
resonator connection, see section 27,
Clock Pulse Generator.
UXTAL A5
Input
UEXTAL B5
Input
For connection to a crystal resonator for
USB
UXSEL D5
Input
USB clock source select pin
φ
D3
5
Output Supplies the system clock to external
devices.
Clock
EXCL
D3
5
Input
32.768-kHz external clock for sub clock
should be supplied.
Operating
mode control
MD2
MD1
F1
D1
14
9
Input
These pins set the operating mode.
Inputs at these pins should not be
changed during operation.
RES
E4
8
Input
Reset pin. When this pin is low, the chip
is reset.
RESO
B3
142
Output Outputs a reset signal to an external
device.
STBY
E1
12
Input
When this pin is low, a transition is made
to hardware standby mode.
System
control
FWE
D6
137
Input
Pin for use by flash memory.
Summary of Contents for H8S Family
Page 2: ...Rev 1 00 Mar 12 2008 Page ii of xIviii...
Page 8: ...Rev 1 00 Mar 12 2008 Page viii of xIviii...
Page 28: ...Rev 1 00 Mar 12 2008 Page xxviii of xIviii...
Page 48: ...Rev 1 00 Mar 12 2008 Page xlviii of xIviii...
Page 70: ...Section 1 Overview Rev 1 00 Mar 12 2008 Page 22 of 1178 REJ09B0403 0100...
Page 108: ...Section 2 CPU Rev 1 00 Mar 12 2008 Page 60 of 1178 REJ09B0403 0100...
Page 116: ...Section 3 MCU Operating Modes Rev 1 00 Mar 12 2008 Page 68 of 1178 REJ09B0403 0100...
Page 152: ...Section 5 Interrupt Controller Rev 1 00 Mar 12 2008 Page 104 of 1178 REJ09B0403 0100...
Page 206: ...Section 6 Bus Controller BSC Rev 1 00 Mar 12 2008 Page 158 of 1178 REJ09B0403 0100...
Page 420: ...Section 9 14 Bit PWM Timer PWMX Rev 1 00 Mar 12 2008 Page 372 of 1178 REJ09B0403 0100...
Page 476: ...Section 12 Watchdog Timer WDT Rev 1 00 Mar 12 2008 Page 428 of 1178 REJ09B0403 0100...
Page 552: ...Section 14 CRC Operation Circuit CRC Rev 1 00 Mar 12 2008 Page 504 of 1178 REJ09B0403 0100...
Page 712: ...Section 18 I2 C Bus Interface IIC Rev 1 00 Mar 12 2008 Page 664 of 1178 REJ09B0403 0100...
Page 804: ...Section 19 LPC Interface LPC Rev 1 00 Mar 12 2008 Page 756 of 1178 REJ09B0403 0100...
Page 838: ...Section 20 Ethernet Controller EtherC Rev 1 00 Mar 12 2008 Page 790 of 1178 REJ09B0403 0100...
Page 964: ...Section 24 RAM Rev 1 00 Mar 12 2008 Page 916 of 1178 REJ09B0403 0100...
Page 1066: ...Section 25 Flash Memory Rev 1 00 Mar 12 2008 Page 1018 of 1178 REJ09B0403 0100...
Page 1098: ...Section 26 Boundary Scan JTAG Rev 1 00 Mar 12 2008 Page 1050 of 1178 REJ09B0403 0100...
Page 1226: ...Rev 1 00 Mar 12 2008 Page 1178 of 1178 REJ09B0403 0100...
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