TS87C54X2 Temic Semiconductors, TS87C54X2 Datasheet - Page 8
TS87C54X2
Manufacturer Part Number
TS87C54X2
Description
8-bit CMOS Microcontroller 0-60 MHz
Manufacturer
Temic Semiconductors
Datasheet
1.TS87C54X2.pdf
(58 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
TS87C54X2-LCA
Manufacturer:
CYPRESS
Quantity:
13
Company:
Part Number:
TS87C54X2-MCB
Manufacturer:
ATMEL
Quantity:
500
Part Number:
TS87C54X2-MCB
Manufacturer:
TEMIC
Quantity:
20 000
Company:
Part Number:
TS87C54X2-MCC
Manufacturer:
TEMIC
Quantity:
245
Part Number:
TS87C54X2-MCC
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Company:
Part Number:
TS87C54X2-MCE
Manufacturer:
ATMEL
Quantity:
5
Company:
Part Number:
TS87C54X2-MIB
Manufacturer:
ATMEL
Quantity:
27
TS80C54X2/C58X2
TS87C54X2/C58X2
The X2 bit in the CKCON register (See Table 4.) allows to switch from 12 clock cycles per instruction to 6 clock
cycles and vice versa. At reset, the standard speed is activated (STD mode). Setting this bit activates the X2 feature
(X2 mode).
CAUTION
In order to prevent any incorrect operation while operating in X2 mode, user must be aware that all peripherals
using clock frequency as time reference (UART, timers) will have their time reference divided by two. For example
a free running timer generating an interrupt every 20 ms will then generate an interrupt every 10 ms. UART with
4800 baud rate will have 9600 baud rate.
8
XTAL1
XTAL1:2
X2 bit
CPU clock
STD Mode
Figure 2. Mode Switching Waveforms
X2 Mode
Rev. B - Aug. 31, 1999
STD Mode