Z86E6116PSC Datasheet, PDF (20/69 Pages) Zilog, Inc. – Z86E61/Z86E63 CMOS Z8 16K/32K EPROM Microcontroller

Z86E61/E63
CMOS Z8 16K/32K EPROM Microcontroller
16
Z86E61
/E63
MCU
Port 3
(I/O or Control)
Figure 9. Port 3 Configuration
Port 3 is configured under software control to provide the following control func-
tions: handshake for Ports 0 and 2 (DAV and RDY); four external interrupt request
signals (IRQ3-IRQ0); timer input and output signals (TIN and TOUT) Data Mem-
ory Select (/DM) and EPROM control signals (P30 = CE, P31 = OE, P32 = EPM
and P33 = VPP).
Table 21. Port 3 Pin Assignments
Pin I/O CTCI Int. P0 HS P1 HS P2 HS UART
Ext EPROM
P30 IN T_IN
IRQ3
Serial In
CE
P31 IN T_IN
IRQ2
D/R
OE
P32 IN T_IN
IRQ0 D/R
EPM
P33 IN T_IN
IRQ1
D/R
V_PP
P34 OUT T_OUT
R/D
DM
P35 OUT T_OUT
R/D
P36 OUT T_OUT
R/D
P37 OUT T_OUT
Serial Out
T0
IRQ4
T1
IRQ5
1. HS = Handshake Signals D = Data Available R = Ready
PS014401-1001