Z86D990 Datasheet, PDF (14/102 Pages) Zilog, Inc. – Low-Voltage Micro controllers with ADC

Z86D990/Z86D991 OTP and Z86L99X ROM
Low-Voltage Microcontrollers with ADC
7
P25
P26
P27
P44/ADC0
P45/ADC1
P46/ADC2
P47/ADC3
V_DD*
XTAL2
XTAL1
P51/CIN1/Capture Timer Input
P52/CIN2/T1 Timer Input
P53/CREF2
P54/COUT1
1
28
2
27
3
26
4 _Z86D991/ 25
5 _Z86L991 24
6
23
7
22
8
21
9
20
10
19
11
18
12
17
13
16
14
15
P24
P23
P22
P21
P20
P43/Combined T8 T16 Output
V_SS**
P42
P41/T16 Output
P40/T8 Output
P50/CREF1
P56/T1 Timer Output
P57
P55/COUT2
Notes:
1. P43 is a controlled current output.
2. P54, P55, P56, and P57 are high drive
outputs.
* V_DD = V_{DD_CORE} + V_{DD_padring} + AV_DD
Figure 4. 28-Pin SOIC/DIP Pin Assignment—User Mode
Pins Configuration
Table 2 describes the pins.
Symbol
P20
P21
P22
P23
P24
P25
P26
P27
P40
Table 2. Pin Descriptions
Pin #
28
40
PDIP/SOIC PDIP
24
34
25
35
26
36
27
37
28
38
1
3
2
4
3
5
19
29
48
SSOP
40
41
44
45
46
3
4
5
34
Direction
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
Description
Port 2 Bit 0
Port 2 Bit 1
Port 2 Bit 2
Port 2 Bit 3
Port 2 Bit 4
Port 2 Bit 5
Port 2 Bit 6
Port 2 Bit 7
Port 4 Bit 0, T8 Output
PS003807-1002
PRELIMINARY