TSC80251-SK TEMIC [TEMIC Semiconductors], TSC80251-SK Datasheet - Page 8

• Manufacturer Part Number: TSC80251-SK
• Description: 8/16-bit Microcontroller with Serial Communication Interfaces
• Manufacturer: TEMIC [TEMIC Semiconductors]

TSC80251G2D
Note:
1. The description of A15:8/P2.7:0 and AD7:0/P0.7:0 are for the Non-Page mode chip configuration. If the chip is configured in Page mode
8
WAIT#
Signal
WCLK
Name
XTAL1
XTAL2
operation, port 0 carries the lower address bits (A7:0) while port 2 carries the upper address bits (A15:8) and the data (D7:0).
WR#
VSS1
VSS2
VSS
Type
GND
GND
GND
O
O
O
I
I
Circuit Ground
Secondary Ground 1
Not available on DIP package.
Secondary Ground 2
Not available on DIP package.
Real-time Synchronous Wait States Input
Wait Clock Output
Write
Input to the on-chip inverting oscillator amplifier
Output of the on-chip inverting oscillator amplifier
Connect this pin to ground.
This ground is provided to reduce ground bounce and improve power supply bypassing.
Connection of this pin to ground is recommended. However, when using the TSC80251G2D
as a pin-for-pin replacement for a 8xC51 product, VSS1 can be unconnected without loss of
compatibility.
This ground is provided to reduce ground bounce and improve power supply bypassing.
Connection of this pin to ground is recommended. However, when using the TSC80251G2D
as a pin-for-pin replacement for a 8xC51 product, VSS2 can be unconnected without loss of
compatibility.
The real-time WAIT# input is enabled by setting RTWE bit in WCON (S:A7h). During bus
cycles, the external memory system can signal ‘system ready’ to the microcontroller in real
time by controlling the WAIT# input signal.
The real-time WCLK output is enabled by setting RTWCE bit in WCON (S:A7h). When
enabled, the WCLK output produces a square wave signal with a period of one half the
oscillator frequency.
Write signal output to external memory.
To use the internal oscillator, a crystal/resonator circuit is connected to this pin. If an external
oscillator is used, its output is connected to this pin. XTAL1 is the clock source for internal
timing.
To use the internal oscillator, a crystal/resonator circuit is connected to this pin. If an external
oscillator is used, leave XTAL2 unconnected.
Description
Rev. A - May 7, 1999
P1.6
P1.7
P3.6
Alternate
Function