TPM754A NXP Semiconductors, TPM754A Datasheet - Page 3

• Manufacturer Part Number: TPM754A
• Description: Microcontroller With Trackpoint Microcode From Ibm
• Manufacturer: NXP Semiconductors

1. AV
Philips Semiconductors
PIN DESCRIPTION
NOTE:
1999 Nov 11
V
V
P1.0–P1.2
P3.0–P3.7
RST
X1
X2
AV
AV
ZIN
YIN
XIN
XYZRAMP
DECOUPLE
VREG
XYDACBIAS
XYSOURCE
ZDAC
XYDAC
MNEMONIC
SS
CC
Microcontroller with TrackPoint
be in the range 4.5 V to 5.5 V.
CC
SS
SS
1
1
(reference ground) must be connected to 0 V (ground). AV
21, 23, 24
PIN NO.
25–28
1–4,
DIP
22
24
23
14
13
10
12
15
16
17
18
19
20
11
8
3
1
4
2
5
7
6
9
TYPE
I/O
I/O
O
O
O
O
O
O
O
O
O
I
I
I
I
I
I
I
I
I
I
I
I
I
I
Circuit Ground Potential.
Supply voltage during normal, idle, and power-down operation.
Port 1: Port 1 is a 3-bit bidirectional I/O port with internal pull-ups on P1.0 and P1.1. Port 1 pins that
have 1s written to them can be used as inputs. As inputs, port 1 pins that are externally pulled low will
source current because of the internal pull-ups (P1.0, P1.1). (See DC Electrical Characteristics: I
Port 1 also serves the special function features listed below (Note: P1.0 does not have the strong
pullup that is on for 2 oscillator periods.):
INT0 (P1.0): External interrupt 0.
CEX (P1.1): PCA clock output.
Port 3: Port 3 is an 8-bit bidirectional I/O port with internal pull-ups. Port 3 pins that have 1s written to
them are pulled high by the internal pull-ups and can be used as inputs. As inputs, port 3 pins that are
externally being pulled low will source current because of the pull-ups. (See DC Electrical
Characteristics: I
Port 3 also serves the special function as listed below:
ECI (P3.6): External PCA clock input.
RxD/T0 (P3.4): Serial port receiver data input.
INT1: External interrupt 1.
TxD/T1 (P3.5): Serial port transmitter data.
Reset: A high on this pin for two machine cycles while the oscillator is running resets the device.
(NOTE: The TPM754 does not have an internal reset resistor.)
Crystal 1: Input to the inverting oscillator amplifier and input to the internal clock generator circuits.
Crystal 2: Output from the inverting oscillator amplifier.
Analog supply voltage and reference input.
Analog supply and reference ground.
ZIN: Input to analog multiplexer.
YIN: Input to analog multiplexer.
XIN: Input to analog multiplexer.
XYZRAMP: Provides a low impedance pulldown to V
DECOUPLE: Output from regulated supply for connection of decoupling capacitors.
VREG: Provides regulated analog supply output.
XYDACBIAS: Provides source voltage for bias of external circuitry.
XYSOURCE: Provides source voltage from regulated analog supply.
ZDAC: Switchable output from the internal DAC.
XYDAC: Non-switchable output from the internal DAC.
IL
Timer 0 external clock input.
Timer 1 external clock input.
). (Note: P3.5 does not have the strong pullup that is on for 2 oscillator periods.)
microcode from IBM
CC
(reference input) cannot differ from V
3
NAME AND FUNCTION
SS
under S/W control.
CC
by more than 0.2 V, and must
Preliminary specification
TPM754A
IL
).