mpc89x515a Megawin Technology, mpc89x515a Datasheet - Page 6

• Manufacturer Part Number: mpc89x515a
• Description: 8-bit Micro-controller
• Manufacturer: Megawin Technology

6
P3.7 (/RD)
P4.0
P4.1
P4.2 (/INT3)
P4.3 (/INT2)
RESET
ALE
/PSEN
/EA
XTAL1
XTAL2
VDD
VSS
17
30
29
31
19
18
40
20
9
44
19
23
34
12
10
33
32
35
21
20
22
1
MPC89x515A Data Sheet
13
17
28
39
27
26
29
15
14
38
16
4
6
BU Port4 is extended I/O ports such like Port1. It can
IS
O
O
O
G
P
I
I
Alias RXD and TXD.
P3.2 and P3.3 also act as external interrupt
sources, alias INT0 and INT1.
P3.4 and P3.5 also act as event sources for
timer0 and timer1 individually, alias T0 and T1.
P3.6 also acts as write signal while access to
external memory, alias /WR.
P3.7 also acts as read signal while access to
external memory, alias /RD.
be available only on 44L-PLCC and 44L-PQFP
package.
A high on this pin for at least two machine cycles
will reset the device.
Output pulse for latching the low byte of address
during accesses to external memory.
active.
fetch program code from external flash memory.
An
embedded in this pin.
Input to the inverting oscillator amplifier.
Output from the inverting amplifier.
Power Supply
Ground
The read strobe to external program memory, low
EA must be kept at low to enable the device to
internal
pull-up
resistance
MEGAWIN
has
been