Maxim Integrated Ultra-High-Speed Flash Microcontroller - Manual (Page 23)

4-15
TSL
Bit 5
AID
Bit 4
Bits 3, 2, 1
SEL
Bit 0
Toggle Select. When clear (= 0), DPTR-related instructions do not affect the SEL bit. When set
(= 1), the SEL bit is toggled following execution of any of the below DPTR-related instructions:
INC DPTR
MOV DPTR, #data16
MOVC A, @A+DPTR
MOVX A, @DPTR
MOVX @DPTR, A
Autoincrement/Decrement Enable. When set, the active data pointer is automatically increment-
ed or decremented (as determined by ID1, ID0 bit settings) following execution of any of the below
DPTR-related instructions:
MOVC A, @A+DPTR
MOVX A, @DPTR
MOVX @DPTR, A
Reserved. These bits read 010b.
Data Pointer Select. This bit selects the active data pointer.
0 = Instructions that use the DPTR use DPL and DPH.
1 = Instructions that use the DPTR use DPL1 and DPH1.
SMOD_0
Bit 7
SMOD0
Bit 6
OFDF
Bit 5
OFDE
Bit 4
GF1
Bit 3
GF0
Bit 2
Serial Port 0 Baud Rate Doubler Enable. This bit enables/disables the serial baud rate doubling
function for Serial Port 0.
0 = Serial Port 0 baud rate is that defined by baud rate generation equation.
1 = Serial Port 0 baud rate is double that defined by baud rate generation equation.
Framing Error Detection Enable. When clear (= 0), SCON1.7 and SCON0.7 serve as mode select
bit SM0 for the respective serial ports. When set (= 1), SCON1.7 and SCON0.7 report whether a
Framing Error has been detected.
Oscillator Fail Detect Flag. When OFDE = 1, this flag will be set if a reset condition is generated
due to oscillator failure. This bit is cleared on a power-on reset and is unchanged by other reset
sources. This bit must be cleared by software.
Oscillator Fail Detect Enable. When set (= 1), the oscillator fail detect circuitry and flag genera-
tion are enabled. An oscillator fail detection occurs if the crystal oscillator falls below ~20kHz. An
oscillator fail detection does not occur if the oscillator is halted through software setting of the STOP
bit (PCON.1) or when running from the internal ring oscillator source. When clear (= 0), the oscil-
lator fail detect circuitry is disabled.
General-Purpose User Flag 1. This is a general-purpose flag for software control.
General-Purpose User Flag 0. This is a general-purpose flag for software control.
R = Unrestricted read, W = Unrestricted write, -n = Value after reset, * = See description
Power Control (PCON)
7 6 5 4 3 2 1 0
SFR 87h SMOD_0 SMOD0 OFDF OFDE GF1 GF0 STOP IDLE
RW-0 RW-0 RW-0* RW-0* RW-0 RW-0 RW-0 RW-0
Ultra-High-Speed Flash
Microcontroller User’s Guide
Maxim Integrated