Pin Functions - Renesas H8S/2100 Series Hardware Manual

1.4.3

Pin Functions

Table 1.4 Pin Functions
Type Symbol TFP-144V BP-176V TLP-145V I/O
Power VCC
supply
VCL
VSS
Clock XTAL
EXTAL
φ
EXCL
ExEXCL 32
Operating MD2
mode MD1
control
RES
System
control
Pin No.
1, 36, 86 A1, J15,
P1, P2
13 F1
7, 42, 95, D1, D2,
111, 139 P4, R4,
F12, F13,
B13,
A13, A4,
B4
143 A2
144 B2
18 H1
18 H1
M3
25 K1
9 E2
8 E3
Name and Function
B1, M1, Input Power supply pins. Connect all
H10 these pins to the system power
supply. Connect the bypass
capacitor between VCC and VSS
(that is located near these pins).
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.
D2, L3, Input Ground pins. Connect all these
F10, B11, pins to the system power supply
C5 (0 V).
A3 Input For connection to a crystal
resonator. An external clock can
A2 Input
be supplied from the EXTAL pin.
For an example of crystal
resonator connection, see section
25, Clock Pulse Generator.
F4 Output Supplies the system clock to
external devices.
F4 Input 32.768 kHz external sub clock
should be supplied. To which pin
K1 Input
the external clock is input can be
selected from the EXCL and
ExEXCL pins.
H1 Input These pins set the operating
D1 mode. Inputs at these pins should
not be changed during operation.
D3 Input Reset pin. When this pin is low,
the chip is reset.
Rev. 1.00 May 09, 2008 Page 19 of 954
Section 1 Overview
REJ09B0462-0100