Hitachi H8/3008, Hardware Manual

Page: 25 / 645

9
1.3.2 Pin Functions
Table 1.3 summarizes the pin functions. The 5 V operation models have a V
CL
pin, and require the
connection of an external capacitor.
Table 1.3 Pin Functions
Pin No.
Type Symbol
FP-100B
TFP-100B FP-100A I/O
Name and Function
Power V
CC
1, 35,
68 3, 37,
70 Input Power: For connection to the power supply.
Connect all V
CC
pins to the system power
supply.
V
SS
11, 22,
44, 57,
65, 92 13, 24,
46, 59,
67, 94 Input Ground: For connection to ground (0 V).
Connect all V
SS
pins to the 0-V system power
supply.
Internal
step-down
pin V
CL
1* 3* Output Connect an external capacitor between this
pin and GND (0 V). Do not connect to V
CC
.
0.1
µ
F
V
CL
Clock XTAL 67 69 Input For connection to a crystal resonator.
For examples of crystal resonator and external
clock input, see section 20, Clock Pulse
Generator.
EXTAL 66 68 Input For connection to a crystal resonator or input
of an external clock signal. For examples of
crystal resonator and external clock input, see
section 20, Clock Pulse Generator.
φ
61 63 Output System clock: Supplies the system clock to
external devices.
Operating
mode
control MD
2
to
MD
0
75 to 73 77 to 75 Input Mode 2 to mode 0: For setting the operating
mode, as follows. Inputs at these pins must
not be changed during operation.
MD
2
MD
1
MD
0
Operating Mode
0 0 0 Setting prohibited
0 0 1 Mode 1
0 1 0 Mode 2
0 1 1 Mode 3
1 0 0 Mode 4
1 0 1 Setting prohibited
1 1 0 Setting prohibited
1 1 1 Setting prohibited