SAB-C167SR-LM SIEMENS [Siemens Semiconductor Group], SAB-C167SR-LM Datasheet - Page 12

• Manufacturer Part Number: SAB-C167SR-LM
• Description: 16-Bit CMOS Single-Chip Microcontroller
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

Pin Definitions and Functions
Symbol
PORT1:
P1L.0 -
P1L.7,
P1H.0 -
P1H.7
XTAL1
XTAL2
RSTIN
RSTOUT 141
NMI
V
V
V
Semiconductor Group
AREF
AGND
PP
Pin
Number
118 -
125
128 -
135
132
133
134
135
138
137
140
142
37
38
84
Input (I)
Output (O)
I/O
I
I
I
I
I
O
I
O
I
–
–
–
(cont’d)
Function
PORT1 consists of the two 8-bit bidirectional I/O ports P1L
and P1H. It is bit-wise programmable for input or output via
direction bits. For a pin configured as input, the output driver
is put into high-impedance state. PORT1 is used as the 16-bit
address bus (A) in demultiplexed bus modes and also after
switching from a demultiplexed bus mode to a multiplexed
bus mode.
The following PORT1 pins also serve for alternate functions:
P1H.4
P1H.5
P1H.6
P1H.7
XTAL1:
XTAL2:
To clock the device from an external source, drive XTAL1,
while leaving XTAL2 unconnected. Minimum and maximum
high/low and rise/fall times specified in the AC Characteristics
must be observed.
Reset Input with Schmitt-Trigger characteristics. A low level at
this pin for a specified duration while the oscillator is running
resets the C167SR. An internal pullup resistor permits power-
on reset using only a capacitor connected to
Internal Reset Indication Output. This pin is set to a low level
when the part is executing either a hardware-, a software- or a
watchdog timer reset. RSTOUT remains low until the EINIT
(end of initialization) instruction is executed.
Non-Maskable Interrupt Input. A high to low transition at this
pin causes the CPU to vector to the NMI trap routine. When
the PWRDN (power down) instruction is executed, the NMI
pin must be low in order to force the C167SR to go into power
down mode. If NMI is high, when PWRDN is executed, the
part will continue to run in normal mode.
If not used, pin NMI should be pulled high externally.
Reference voltage for the A/D converter.
Reference ground for the A/D converter.
Flash
programming voltage for flash versions of the C167SR.
Note: This pin is not connected (NC) on non-flash versions.
programming
CC24IO
CC25IO
CC26IO
CC27IO
Input to the oscillator amplifier and input to the
internal clock generator
Output of the oscillator amplifier circuit.
9
CAPCOM2: CC24 Capture Input
CAPCOM2: CC25 Capture Input
CAPCOM2: CC26 Capture Input
CAPCOM2: CC27 Capture Input
voltage.
This
pin
V
SS
accepts
.
C167SR
the