Z86C34 Datasheet, PDF (6/70 Pages) Zilog, Inc. – CMOS Z8 MCUs WITH ASCI UART OFFER EFFICIENT, COST-EFFECTIVE DESIGN FLEXIBILITY

Z86C34/C35/C36/C44/C45/C46
CMOS Z8® MCUs with ASCI UART
PIN DESCRIPTION (Continued)
ZiLOG
33
P21 34
23
22 P30
P22
P36
P23
P37
P24
P35
DS
RESET
NC
Z86C44/C45/C46
R/RL
R/W
AS
P25
P34
P26
P33
P27
P32
P04 44
12 P31
1
11
Figure 6. 44-Pin QFP Pin Configuration
Table 4. 44-Pin QFP Pin Identification
Pin # Symbol
1–2 P05–06
3–4 P14–15
5
P07
6–7 V_CC
8–9 P16–17
10 XTAL2
11 XTAL1
12–14 P31–33
15 P34
16 AS
17 R/RL
18 RESET
19 P35
20 P37
Function
Direction
Port 0, Bits 5,6
Port 1, Bits 4,5
Port 0, Bit 7
Power Supply
In/Output
In/Output
In/Output
Port 1 Bits 6,7
Crystal Oscillator
Crystal Oscillator
Port 3, Bits 1,2,3
Port 3, Bit 4
Address Strobe
ROM/ROMless Control
Reset
Port 3, Bit 5
Port 3, Bit 7
In/Output
Output
Input
Input
Output
Output
Input
Input
Output
Output
Table 4. 44-Pin QFP Pin Identification
Pin # Symbol
21 P36
22 P30
23–24 P00–01
25–26 P10–11
27 P02
28–29 GND
30–31 P12–13
32 P03
33–37 P20–24
38 DS
39 NC
40 R/W
Function
Port 3, Bit 6
Port 3, Bit 0
Port 0, Bits 0,1
Port 1, Bits 0,1
Port 0, Bit 2
Ground
Port 1, Bits 2,3
Port 0, Bit 3
Port 2, Bits 0,1,2,3,4
Data Strobe
Not Connected
READ/WRITE
Direction
Output
Input
In/Output
In/Output
In/Output
In/Output
In/Output
In/Output
Output
Output
6
PRELIMINARY
DS007601-Z8X0499