em78f644nso28s ELAN Microelectronics Corp, em78f644nso28s Datasheet - Page 46

• Manufacturer Part Number: em78f644nso28s
• Description: Flash Series 8-bit Microcontroller
• Manufacturer: ELAN Microelectronics Corp

EM78F648/644/642/641/548/544/542/541N
8-Bit Microcontroller
36 •
6.1.35 Bank 3 R5 (TMRCON: Timer A and Timer B Control
Bit 7 (TAEN): Timer A enable bit
Bits 6 ~ 4 (TAP2 ~ TAP0): Timer A clock prescaler option bits.
Bit 3 (TBEN): Timer B enable bit
Bits 2 ~ 0 (TBP2 ~ TBP0): Timer B clock prescaler option bits
6.1.36 Bank 3 R6 (TBHP: Table Point Register for Instruction
Bit 7 (MLB):
Bits 6 ~ 4:
Bits 3 ~ 0:
TAP2/TBP2
TAEN
Bit 7
MLB
Bit 7
For F642/542N, Bit 3 is unused. Set to “0” all the time.
For F641/541N, Bit 3 & Bit 2 are unused. Set to “0” all the time.
0
0
0
0
1
1
1
1
TAP2
Bit 6
Bit 6
1: Enable Timer A
1: Enable Timer A
Select MSB or LSB machine code to be moved to the register.
The machine code is pointed by the TBLP and TBHP registers.
Not used, set to “0” all the time.
These are the 4 most significant bits of program code address
0: Disable Timer A (default)
0: Disable Timer A (default)
TAP1/TBP1
-
For F642/542N, F641/541N, this register is reserved.
0
0
1
1
0
0
1
1
TBRD )
Register)
TAP1
Bit 5
Bit 5
-
TAP0/TBP0
0
1
0
1
0
1
0
1
TAP0
Bit 4
Bit 4
(This specification is subject to change without further notice)
-
NOTE
NOTE
RBit11
TBEN
Bit 3
Bit 3
Product Specification (V1.0) 05.05.2010
1:2 (Default)
Prescale
1:4
1:8
1:16
1:32
1:64
1:128
1:256
RBit10
TBP2
Bit 2
Bit 2
TBP1
RBit9
Bit 1
Bit 1
TBP0
RBit8
Bit 0
Bit 0