EM78P153EN EMC [ELAN Microelectronics Corp], EM78P153EN Datasheet - Page 14

• Manufacturer Part Number: EM78P153EN
• Description: EM78P153E is an 8-bit microprocessor with low-power and high-speed CMOS technology
• Manufacturer: EMC [ELAN Microelectronics Corp]

This specification is subject to change without prior notice.
4.4 I/O Ports
The I/O registers, both Port 5 and Port 6, are bi-directional tri-state I/O ports. Port 6 can be pulled-high
internally by software except P63. In addition, Port 6 can also have open-drain output by software
except P63. Input status changed interrupt (or wake-up) function is available from Port 6. P50 ~ P52 and
P60 ~ P62 pins can be pulled-down by software. Each I/O pin can be defined as "input" or "output" pin
by the I/O control register (IOC5 ~ IOC6) except P63. The I/O registers and I/O control registers are both
readable and writable. The I/O interface circuits for Port 5 and Port 6 are shown in Fig. 6, Fig.7, and Fig.
8 respectively.
TCC
Pin
(in lOCE)
WDTE
WDT
CLK(Fosc/2 or Fosc/4)
TE
Fig. 5 Block Diagram of TCC and WDT
0
1
0
1
TS
M
U
X
PAB
M
U
X
1
0
14
PAB
M
U
X
WDT Time Out
0
8-bit Counter
8-to-1 MUX
MUX
1
2 cycles
SYNC
TCC Overflow Interrupt
PAB
PSR0~PSR2
Data Bus
TCC(R1)
EM78P153E
OTP ROM
2002/03/01