PSD4235G2-90U STMicroelectronics, PSD4235G2-90U Datasheet - Page 74

• Manufacturer Part Number: PSD4235G2-90U
• Description: IC FLASH 4MBIT 90NS 80TQFP
• Manufacturer: STMicroelectronics

Specifications of PSD4235G2-90U

• Format - Memory: FLASH
• Memory Type: FLASH
• Memory Size: 4M (512K x 8)
• Speed: 90ns
• Interface: Parallel
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 80-TQFP, 80-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-1968

MCU bus interface
19.6
Figure 21. Interfacing the PSD with an MC68331
74/129
RESET\
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D15
111
110
109
108
105
104
103
102
100
99
98
97
94
93
92
91
89
88
77
76
75
74
73
72
71
MC68331
MC683xx and MC68HC16
Figure 21
The data bus from the MC68331 is connected to Port F (D0-D7) and Port G (D8-D15). The
SIZ0 and A0 inputs determine the high/low byte selection. The R/W, DS and SIZ0 signals
are connected to the CNTL0-CNTL2 pins.
The MC68HC16, and other members of the MC683xx family, has the same bus connection
to the PSD as the MC68331 shown in
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D15
DSACK0
DSACK1
IRQ1
IRQ2
IRQ3
IRQ4
IRQ5
IRQ6
IRQ7
BGACK_CS2/
shows a MC68331 with a 16-bit non-multiplexed data bus and 24-bit address bus.
A23_CS10/
CSBOOT/
FC0_CS3/
FC1_CS4/
FC2_CS5/
A19_CS6/
A20_CS7/
A21_CS8/
A22_CS9/
BR_CS0/
BG_CS1/
CLKOUT
RESET
SIZ0
SIZ1
A10
A11
A12
A13
A14
A15
A16
A17
A18
R_W
DS
AS
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
90
20
21
22
23
24
25
26
27
30
31
32
33
35
36
37
38
41
42
121
122
123
124
125
79
85
81
82
68
80
66
112
113
114
115
118
119
120
A16
A17
A18
A19
A20
A21
A22
A23
RESET\
R/W\
DS\
SIZ0
Figure
AS
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
10
11
12
13
14
15
16
17
18
19
20
59
60
40
79
80
39
71
72
73
74
75
76
77
78
3
4
5
6
7
1
2
21.
PSD
ADIO0
ADIO1
ADIO2
ADIO3
ADIO4
ADIO5
ADIO6
ADIO7
ADIO8
ADIO9
ADIO10
ADIO11
ADIO12
ADIO13
ADIO14
ADIO15
CNTL0(R/W)
CNTL1(DS)
CNTL2 (SIZ0)
PD0 (AS)
PD1 (CLKIN)
PD2 (CSI)
PD3
RESET
PE0 (TMS)
PE1 (TCK/ST)
PE2 (TDI)
PE3 (TDO)
PE4 (TSTAT/RDY)
PE5 (TERR)
PE6
PE7
VCC_BAR
PG0
PG1
PG2
PG3
PG4
PG5
PG6
PG7
PC0
PC1
PC2
PC3
PC4
PC5
PC6
PC7
D[15:0]
PB0
PB1
PB2
PB3
PB4
PB5
PB6
PB7
A[23:0]
PF0
PF1
PF2
PF3
PF4
PF5
PF6
PF7
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
31
32
33
34
35
36
37
38
21
22
23
24
25
26
27
28
51
52
53
54
55
56
57
58
61
62
63
64
65
66
67
68
41
42
43
44
45
46
47
48
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D15
A16
A17
A18
A19
PSD4235G2
AI04951c
A[23:0]
D[15:0]