TS80C54 ATMEL [ATMEL Corporation], TS80C54 Datasheet - Page 10

• Manufacturer Part Number: TS80C54
• Description: 8-bit CMOS Microcontroller 16/32 Kbytes ROM/OTP
• Manufacturer: ATMEL [ATMEL Corporation]

10
AT/TS8xC54/8X2
Table 6-1.
Reset Value = XXXX XXX0b
Not bit addressable
For further details on the X2 fe ature, please refer to ANM072 ava ilable on the web
(http://www.atmel.com)
Number
Bit
7
6
5
4
3
2
1
0
7
-
Mnemonic
Bit
CKCON Register
CKCON - Clock Control Register (8Fh)
X2
-
-
-
-
-
-
-
6
-
Reserved
The value read from this bit is indeterminate. Do not set this bit.
Reserved
The value read from this bit is indeterminate. Do not set this bit.
Reserved
The value read from this bit is indeterminate. Do not set this bit.
Reserved
The value read from this bit is indeterminate. Do not set this bit.
Reserved
The value read from this bit is indeterminate. Do not set this bit.
Reserved
The value read from this bit is indeterminate. Do not set this bit.
Reserved
The value read from this bit is indeterminate. Do not set this bit.
CPU and peripheral clock bit
Clear to select 12 clock periods per machine cycle (STD mode, F
Set to select 6 clock periods per machine cycle (X2 mode, F
5
-
4
-
3
Description
-
2
-
OSC
=F
OSC
XTAL
=F
1
-
).
XTAL
/
4431E–8051–04/06
2).
X2
0