71M6521DE/71M6521FE
Energy Meter IC
DATASHEET
JANUARY 2008
Test Ports
TMUXOUT Pin: One out of 16 digital or 8 analog signals can be selected to be output on the TMUXOUT pin. The function of
the multiplexer is controlled with the I/O RAM register TMUX (0x20AA[4:0]), as shown in Table 59.
TMUX[4:0]
0
Mode
Analog
Analog
Analog
Analog
Analog
Analog
--
Function
DGND
1
Reserved
2
DGND
3-5
Reserved
6
VBIAS
7
Not used
8-0x0F
0x10 – 0x13
0x14
0x15
0x16 – 0x17
0x18
0x19
0x1A
0x1B
0x1C
0X1D
0X1E
0X1F
Reserved
--
Not used
Digital
Digital
RTM (Real time output from CE)
WDTR_EN (Comparator 1 Output AND V1LT3)
Not used
Digital
Digital
Digital
Digital
--
RXD (from Optical interface, w/ optional inversion)
MUX_SYNC
CK_10M (10MHz clock)
CK_MPU (MPU clock)
Reserved
Digital
Digital
Digital
RTCLK (output of the oscillator circuit, nominally 32,786Hz)
CE_BUSY (busy interrupt generated by CE, 396µs)
XFER_BUSY (transfer busy interrupt generated by CE,
nominally every 999.7ms)
Table 59: TMUX[4:0] Selections
Page: 46 of 101
© 2005-2008 TERIDIAN Semiconductor Corporation
v1.0
TERIDIAN [ TERIDIAN SEMICONDUCTOR CORPORATION ]
