ZPSD303B-90JI STMicroelectronics, ZPSD303B-90JI Datasheet - Page 31

• Manufacturer Part Number: ZPSD303B-90JI
• Description: IC MCU PROG 1MB 5V 90NS 44-PLCC
• Manufacturer: STMicroelectronics

Specifications of ZPSD303B-90JI

• Applications: *
• Interface: *
• Voltage - Supply: *
• Package / Case: 44-PLCC
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-3701

14.0
System
Applications
(cont.)
28
PSD3XX Family
Figure 12. PSD3XX Interface With Motorola’s 68HC11
In Figure 12, the PSD3XX is configured to interface with Motorola’s 68HC11, which is a
16-bit address/8-bit data bus microcontroller. Its data bus is multiplexed with the low-order
address byte. The 68HC11 uses E and R/W signals to derive the read and write strobes.
It uses the Address Strobe (AS) for the address latch pulse. RESET is an active-low signal.
The rest of the configuration bits, as well as the unconnected signals, are specific, and thus,
user dependent.
RESET
20
21
22
23
24
25
43
45
47
49
44
46
48
50
34
33
32
31
30
29
28
27
52
51
68HC11
MICROCONTROLLER
PD0
PD1
PD2
PD3
PD4
PD5
PE0
PE1
PE2
PE3
PD4
PE5
PE6
PE7
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
VRH
VRL
XTAL EXTAL
RESET
MODB
MODA
XIRQ
PC0
PC1
PC2
PC3
PC4
PC5
PC6
PC7
PB0
PB1
PB2
PB3
PB4
PB5
PB6
PB7
R/W
IRQ
AS
E
9
10
11
12
13
14
15
16
42
41
40
39
38
37
36
35
5
6
4
17
18
19
2
3
V
CC
23
24
25
26
27
28
29
30
31
32
33
35
36
37
38
39
22
13
2
3
1
AD0/A0
AD1/A1
AD2/A2
AD3/A3
AD4/A4
AD5/A5
AD6/A6
AD7/A7
AD8/A8
AD9/A9
AD10/A10
AD11/A11
AD12/A12
AD13/A13
AD14/A14
AD15/A15
E
R/W/V
AS
RESET
BHE/PSEN
PSD3XX
44
PP
V
CC
A19/CSI
GND
34
0.1µF
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
PB0
PB1
PB2
PB3
PB4
PB5
PB6
PB7
PC0
PC1
PC2
12
21
20
19
18
17
16
15
14
11
10
9
8
7
6
5
4
40
41
42
43