Section 1 Overview
Rev. 1.00 Apr. 28, 2008 Page 19 of 994
REJ09B0452-0100
1.4.3 Pin
Functions
Table 1.4
Pin Functions
Pin No.
Type Symbol TFP-144V
BP-176V TLP-145V I/O
Name
and
Function
VCC
1, 36, 86 A1, J15,
P1, P2
B1, M1,
H10
Input
Power supply pins. Connect all
these pins to the system power
supply. Connect the bypass
capacitor between VCC and VSS
(that is located near these pins).
VCL
13
F1
E1
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
7, 42, 95,
111, 139
D1, D2,
P4, R4,
F12, F13,
B13,
A13, A4,
B4
D2, L3,
F10, B11,
C5
Input
Ground pins. Connect all these
pins to the system power supply
(0 V).
XTAL 143
A2
A3
Input
EXTAL 144
B2
A2
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 25, Clock
Pulse Generator.
φ
18
H1
F4
Output Supplies the system clock to
external devices.
EXCL 18
H1
F4
Input
Clock
ExEXCL 32 M3
K1 Input
32.768 kHz external sub clock
should be supplied. To which pin
the external clock is input can be
selected from the EXCL or
ExEXCL pin.
Operating
mode
control
MD2
MD1
25
9
K1
E2
H1
D1
Input
These pins set the operating mode.
Inputs at these pins should not be
changed during operation.
System
control
RES
8
E3
D3
Input
Reset pin. When this pin is low, the
chip is reset.
Содержание H8S/2100 Series
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