73S1210F-68IMSLASHFSLASHP datasheet(21/126 Pages) TERIDIAN

21 / 126 page

DS_1210F_001

73S1210F Data Sheet

Rev. 1.4

Program Status Word (PSW):

Table 9: PSW Register

MSB

LSB

RS1

–

Bit

Symbol

Function

PSW.7

Carry flag.

PSW.6

Auxiliary Carry flag for BCD operations.

PSW.5

General purpose Flag 0 available for user.

PSW.4

RS1

working register bank:

RS1/RS0

Bank Selected

Location

Bank 0

(0x00 – 0x07)

Bank 1

(0x08 – 0x0F)

Bank 2

(0x10 – 0x17)

Bank 3

(0x18 – 0x1F)

PSW.3

RS0

PSW.2

Overflow flag.

PSW.1

General purpose Flag 1 available for user.

PSW.0

Parity flag, affected by hardware to indicate odd / even number of “one” bits

in the Accumulator, i.e. even parity.

Stack Pointer: The stack pointer (SP) is a 1-byte register initialized to 0x07 after reset. This register is

incremented before PUSH and CALL instructions, causing the stack to begin at location 0x08.

Data Pointer: The data pointer (DPTR) is 2 bytes wide. The lower part is DPL, and the highest is DPH.

It can be loaded as a 2-byte register (MOV DPTR,#data16) or as two registers (e.g. MOV DPL,#data8). It

is generally used to access external code or data space (e.g. MOVC A,@A+DPTR or MOVX A,@DPTR

respectively).

Program Counter: The program counter (PC) is 2 bytes wide initialized to 0x0000 after reset. This

memory. Note: The program counter is not mapped to the SFR area.

Port Registers: The I/O ports are controlled by Special Function Register USR70. The contents of the

SFR can be observed on corresponding pins on the chip. Writing a 1 to any of the ports (see Table 10)

causes the corresponding pin to be at high level (3.3V), and writing a 0 causes the corresponding pin to

be held at low level (GND). The data direction register UDIR70 define individual pins as input or output

pins (see the User (USR) Ports section for details).

Table 10: Port Registers

SFR

Address

R/W

Description

USR70

0x90

R/W

USR7).

UDIR70

0x91

R/W

Data direction register for User port bits 0:7. Setting a bit to 0 means

that the corresponding pin is an output.

73S1210F-68IM/F/P Datasheet(PDF) 21 Page - Teridian Semiconductor Corporation

73S1210F-68IM/F/P Datasheet(HTML) 21 Page - Teridian Semiconductor Corporation

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL