73s1210f68im Maxim Integrated Products, Inc., 73s1210f68im Datasheet - Page 22
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73s1210f68im
Manufacturer Part Number
73s1210f68im
Description
Self-contained Smart Card Reader With Pinpad And Power Management
Manufacturer
Maxim Integrated Products, Inc.
Datasheet
1.73S1210F68IM.pdf
(126 pages)
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1.6 Instruction Set
1.7 Peripheral Descriptions
73S1210F Data Sheet
All ports on the chip are bi-directional. Each consists of a Latch (SFR ‘USR70’), an output driver, and an
input buffer, therefore the MPU can output or read data through any of these ports if they are not used for
alternate purposes.
All instructions of the generic 8051 microcontroller are supported. A complete list of the instruction set
and of the associated op-codes is contained in the 73S12xxF Software User’s Guide.
1.7.1
The 73S1210F has one oscillator circuit for the main CPU clock. The main oscillator circuit is designed to
operate with various crystal or external clock frequencies. An internal divider working in conjunction with a
PLL and VCO provides a 96MHz internal clock within the 73S1210F. 96 MHz is the recommended
frequency for proper operation of specific peripheral blocks such as the specific timers, ISO 7816 UART
and interfaces, Step-up converter, and keypad. The clock generation and control circuits are shown in
Figure 3.
22
X12OUT
X12IN
CPUCKDiv
Oscillator and Clock Generation
MCount(2:0)
12.00MHz
HOSCen
HIGH
XTAL
OSC
SCCKenb
See SC Clock descriptions for more accurate diagram
Prescaler 6bits
Prescaler 6bits
CPU CLOCK
Figure 3: Clock Generation and Control Circuits
DIVIDER
SC/SCE
CLOCK
CLOCK
SCLK
6 bits
DIVIDE
DIVIDE
by 120
HCLK
by 96
12.00MHz
Phase
Freq
DET
M DIVIDER
/(2*N + 4)
1.5-48MHz
7.386MHz
SELSC
VCO
SEL
MCLK
96MHz
ETU CLOCK
DIVIDER
12 bits
DIVIDER
MPU CLOCK - CPCLK
/93760
SMART CARD LOGIC
BLOCK CLOCK
KEYCLK
1kHz
ETUCLK
SCECLK
I2CCLK
CLK1M
3.6923MHz
SCCLK
I2C_2x
7.386MHz
ICLK
400kHz
800kHz
1MHz
DS_1210F_001
Rev. 1.4
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