NEC µPD72257 Preliminary User's Manual page 110

Chapter 4
4.7.3.6
Access
Address
Initial Value
31 30 29 28
0 0 0 0
R R R R
15 14 13 12
SMUX
0 0 0
91
R R R/W R/W
Caution
Bit Bit name
23 BUFPUEN7
22 BUFPUEN6
21 BUFPUEN5
20 BUFPUEN4
19 BUFPUEN3
110
SYSPINMUX - Pin multiplex control register
This register controls the pin multiplexer pinout options and the internal pull-up
resistors of pin groups 0 to 7. It further provides control of the SMUXm
multiplexers for some pins.
For a detailed description of pinout options refer to the chapter "Pin Functions".
This register can be read/written in 32-bit units.
<SysC_Base> + 14
H
00PP 000M , whereas
H
• "PP" depends on SYSBOOTMODE.BOOTMODE8 (device type),
SYSBOOTMODE.BOOTMODE[3:0], and
SYSBOOTMODE.BOOTMODE9, refer to below descriptions of the
reset values
• "M" takes on the value of SYSBOOTMODE.BOOTMODE[3:0]
27 26 25 24
0 0 0 0
R R R R
11 10 9 8
SMUX SMUX SMUX SMUX
92 93 94 95
R/W R/W R/W R/W
Writing to the read-only bits is ignored, reading returns undefined values.
The default value "0" of bit 13 must not be changed.
Function
Internal pull-up resistor control of pin group 7:
0 internal pull-up disabled
1 internal pull-up enabled
Internal pull-up resistor control of pin group 6: pins 91 - 96, 99, 100
0 internal pull-up disabled
1 internal pull-up enabled
Internal pull-up resistor control of pin group 5: pins 14, 15, 18 - 22, 25, 79 - 84, 87, 88
0 internal pull-up disabled
1 internal pull-up enabled
Internal pull-up resistor control of pin group 4: pins 42 - 49, 52 - 57, 60, 61
0 internal pull-up disabled
1 internal pull-up enabled
Internal pull-up resistor control of pin group 3: pins 89, 90, 156
0 internal pull-up disabled
1 internal pull-up enabled
Preliminary User's Manual S19203EE1V3UM00
23 22 21 20
BUFP BUFP BUFP BUFP
UEN7 UEN6 UEN5 UEN4
R/W R/W R/W R/W
7 6 5 4
SMUX SMUX SMUX SMU
12 78 26 X127
R/W R/W R/W R/W
System Controller
19 18 17 16
BUFP BUFP BUFP BUFP
UEN3 UEN2 UEN1 UEN0
R/W R/W R/W R/W
3 2 1 0
PINMUX[3:0]
R/W