NXP Semiconductors UM10310 - page 139

NXP Semiconductors UM10310
P89LPC9321 User manual
© NXP B.V. 2008. All rights reserved.
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: salesaddresses@nxp.com
Date of release: 1 December 2008
Document identifier: UM10310_1
Please be aware that important notices concerning this document and the product(s)
described herein, have been included in section ‘Legal information’.
12.7 SPI clock prescaler select . . . . . . . . . . . . . . . 94
13 Analog comparators . . . . . . . . . . . . . . . . . . . . 94
13.1 Comparator configuration. . . . . . . . . . . . . . . . 94
13.2 Internal reference voltage. . . . . . . . . . . . . . . . 96
13.3 Comparator input pins . . . . . . . . . . . . . . . . . . 96
13.4 Comparator interrupt. . . . . . . . . . . . . . . . . . . . 96
13.5 Comparators and power reduction modes . . . 97
13.6 Comparators configuration example. . . . . . . . 97
13.7 Programmable Gain Amplifier (PGA) . . . . . . . 98
14 Keypad interrupt (KBI). . . . . . . . . . . . . . . . . . 100
15 Watchdog timer (WDT) . . . . . . . . . . . . . . . . . 101
15.1 Watchdog function . . . . . . . . . . . . . . . . . . . . 101
15.2 Feed sequence. . . . . . . . . . . . . . . . . . . . . . . 102
15.3 Watchdog clock source . . . . . . . . . . . . . . . . 105
15.4 Watchdog Timer in Timer mode . . . . . . . . . . 106
15.5 Power-down operation . . . . . . . . . . . . . . . . . 107
15.6 Periodic wake-up from power-down without an
external oscillator . . . . . . . . . . . . . . . . . . . . . 107
16 Additional features . . . . . . . . . . . . . . . . . . . . 107
16.1 Software reset. . . . . . . . . . . . . . . . . . . . . . . . 108
16.2 Dual Data Pointers . . . . . . . . . . . . . . . . . . . . 108
17 Data EEPROM. . . . . . . . . . . . . . . . . . . . . . . . . 109
17.1 Data EEPROM read. . . . . . . . . . . . . . . . . . . 110
17.2 Data EEPROM write. . . . . . . . . . . . . . . . . . . 110
17.3 Hardware reset. . . . . . . . . . . . . . . . . . . . . . . 111
17.4 Multiple writes to the DEEDAT register. . . . . 111
17.5 Sequences of writes to DEECON and DEEDAT
registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
17.6 Data EEPROM Row Fill . . . . . . . . . . . . . . . . 111
17.7 Data EEPROM Block Fill . . . . . . . . . . . . . . . 112
18 Flash memory . . . . . . . . . . . . . . . . . . . . . . . . 112
18.1 General description . . . . . . . . . . . . . . . . . . . 112
18.2 Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
18.3 Flash programming and erase . . . . . . . . . . . 113
18.4 Using Flash as data storage: IAP-Lite . . . . . 113
18.5 In-circuit programming (ICP). . . . . . . . . . . . . 117
18.6 ISP and IAP capabilities of the P89LPC9321 117
18.7 Boot ROM. . . . . . . . . . . . . . . . . . . . . . . . . . . 117
18.8 Power on reset code execution . . . . . . . . . . 117
18.9 Hardware activation of Boot Loader. . . . . . . 118
18.10 In-system programming (ISP). . . . . . . . . . . . 118
18.11 Using the In-system programming (ISP). . . . 119
18.12 In-application programming (IAP). . . . . . . . . 122
18.13 IAP authorization key . . . . . . . . . . . . . . . . . . 122
18.14 Flash write enable . . . . . . . . . . . . . . . . . . . . 122
18.15 Configuration byte protection . . . . . . . . . . . . 123
18.16 IAP error status. . . . . . . . . . . . . . . . . . . . . . . 123
18.17 User configuration bytes. . . . . . . . . . . . . . . . 127
18.18 User security bytes. . . . . . . . . . . . . . . . . . . . 128
18.19 Boot Vector register. . . . . . . . . . . . . . . . . . . 129
18.20 Boot status register . . . . . . . . . . . . . . . . . . . 129
19 Instruction set. . . . . . . . . . . . . . . . . . . . . . . . 131
20 Legal information . . . . . . . . . . . . . . . . . . . . . 134
20.1 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . 134
20.2 Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . 134
20.3 Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . 134
21 Tables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
22 Figures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
23 Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138