SLVSJM6 November 2025 MSPM0G5187
UNICOMMUART Module
Functional
ISO-7816 Smartcard Mode can't support 9600 baud rate with lower than 57MHz UARTCLK
To achieve a 9600 baud rate in ISO-7816 Smartcard Mode, and considering the limitations below, a UARTCLK frequency exceeding 57 MHz is required. 1. The ISO-7816 standard dictates that 1 bit requires 372 clock cycles. 2. In MSPM0 ISO-7816 mode, the oversampling rate (OVS) is fixed in the UART peripheral at 16x. Here is the minimum UARTCLK calculation: Required UARTCLK = 9600 * 372 * 16 = 57.139 MHz
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