Z86D990 Datasheet, PDF (12/102 Pages) Zilog, Inc. – Low-Voltage Micro controllers with ADC

Z86D990/Z86D991 OTP and Z86L99X ROM
Low-Voltage Microcontrollers with ADC
5
Pin Descriptions
Figure 2 through Figure 4 show the pin names and locations.
P62
P63
P25
P26
P27
NC
AV_SS
V_REF-
P44
P45
P46
P47
V_REF+
AV_DD
V_{DD_CORE}
V_{DD_padring}
XTAL2
XTAL1
NC
P51
P52
P53
P54
P64
1
48
P61
2
47
P60
3
46
P24
4
45
P23
5
44
P22
6
43
NC
7
42
NC
8
41
P21
9
40
P20
10 _{Z86D990/ 39}
P43
11
12
Z86L990
38
37
VSS
VSS
13
36
P42
14
35
P41
15
34
P40
16
33
P50
17
32
P56
18
31
NC
19
30
NC
20
29
P57
21
281
P55
22
27
P67
23
26
P66
24
25
P65
Notes:
1. Both V_SS pins must be connected to ground.
2. NC is no connection to the die.
3. AV_DD must be connected to V_{DD_CORE} and a 10-µF capacitor for good A/D conversion.
4. Power must be connected to V_{DD_padring}. Current passes to V_{DD_CORE} through the internal
power filter.
Figure 2. 48-Pin SSOP Pin Assignments
PS003807-1002
PRELIMINARY