Z86E30/E31/E40
Z8 4K OTP Microcontroller
Zilog
PCON (FH) 00H
1
D7 D6 D5 D4 D3 D2 D1 D0
Comparator Output Port 3
0 P34, P37 Standard Output*
1 P34, P37 Comparator Output
0 Port 1 Open Drain
1 Port 1 Push-pullActive*
0 Port 0 Open Drain
1 Port 0 Push-pullActive*
0 Port 0 Low EMI
1 Port 0 Standard*
0 Port 1 Low EMI
1 Port 1 Standard*
0 Port 2 Low EMI
1 Port 2 Standard*
0 Port 3 Low EMI
1 Port 3 Standard*
Low EMI Oscillator
0 Low EMI
1 Standard*
* Default SettingAfter Reset
Figure 30. Port Configuration Register (PCON)
(Write Only)
Comparator Output Port 3 (D0). Bit 0 controls the com-
parator output in Port 3. A "1" in this location brings the
comparator outputs to P34 and P37, and a "0" releases the
Port to its standard I/O configuration. The default value is
0.
Low EMI Port 1 (D4). Port 1 can be configured as a Low
EMI Port by resetting this bit (D4=0) or configured as a
Standard Port by setting this bit (D4=1). The default value
is 1. Note: The emulator does not support Port 1 low EMI
mode and must be set D4 = 1.
Port 1 Open-Drain (D1). Port 1 can be configured as an
open-drain by resetting this bit (D1=0) or configured as
push-pull active by setting this bit (D1=1). The default val-
ue is 1.
Low EMI Port 2 (D5). Port 2 can be configured as a Low
EMI Port by resetting this bit (D5=0) or configured as a
Standard Port by setting this bit (D5=1). The default value
is 1.
Port 0 Open-Drain (D2). Port 0 can be configured as an
open-drain by resetting this bit (D2=0) or configured as
push-pull active by setting this bit (D2=1). The default val-
ue is 1.
Low EMI Port 3 (D6). Port 3 can be configured as a Low
EMI Port by resetting this bit (D6=0) or configured as a
Standard Port by setting this bit (D6=1). The default value
is 1.
Low EMI Port 0 (D3). Port 0 can be configured as a Low
EMI Port by resetting this bit (D3=0) or configured as a
Standard Port by setting this bit (D3=1). The default value
is 1.
Low EMI OSC (D7). This bit of the PCON Register con-
trols the low EMI noise oscillator. A "1" in this location con-
figures the oscillator with standard drive. While a "0" con-
figures the oscillator with low noise drive, however, it does
not affect the relationship of SCLK and XTAL. The low EMI
DS97Z8X0500
P R E L I M I N A R Y
43
ZILOG [ ZILOG, INC. ]
